TO 00-25-260

TECHNICAL MANUAL

METHODS AND PROCEDURES MANUAL

UNIQUE IDENTIFICATION ASSET MARKING AND

TRACKING

(ATOS-HILL)

This manual supersedes TO 00-25-260 dated 15 October 2013.

This Technical Manual (TM) applies to Department of the Air Force organizations responsible for the use, maintenance, servicing, and/or

storage of legacy assets that require Unique Identiﬁcation (UID). This TM only applies to legacy assets owned/repaired by the Department

of the Air Force and does not authorize the marking of legacy assets owned by other government organizations. The guidance provided by

this document may be referenced or incorporated into detailed maintenance guides as approved by the item manager(s) responsible for the

legacy items to be marked.

DISTRIBUTION STATEMENT A - Approved for public release; distribution is unlimited WRALC/PA Certiﬁcate No. PA07-0101. Other requests

for this document shall be referred to 416 SCMS/GUBAB, Hill AFB, Utah 84056-5826. Questions concerning technical content shall be referred

to 416 SCMS/GUBAB, Hill AFB, Utah 84056-5826.

Published Under Authority of the Secretary of the Air Force

10 MAY 2022

Dates of issue for original and changed pages are:

Original........0.......10May2022

TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 46, CONSISTING OF THE FOLLOWING:

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LIST OF EFFECTIVE PAGES

INSERT LATEST CHANGED PAGES. DESTROY SUPERSEDED PAGES.

NOTE

The portion of the text affected by the changes is indicated by a vertical line in the outer margins of

the page. Changes to illustrations are indicated by shaded or screened areas, or by miniature

pointing hands.

* Zero in this column indicates an original page.

A USAF

TABLE OF CONTENTS

Chapter Page

LIST OF ILLUSTRATIONS ..................................................... iii

LIST OF TABLES ............................................................ iii

INTRODUCTION ............................................................ v

SAFETY SUMMARY ......................................................... xi

1 INTRODUCTION AND GENERAL INFORMATION ................................... 1-1

1.1 INTRODUCTION .................................................... 1-1

1.2 ASSET MARKING AND TRACKING ...................................... 1-1

1.2.2 Advantages of AMT ................................................... 1-1

1.3 WAYFORWARD..................................................... 1-2

2 INTRODUCTION TO ITEM UNIQUE IDENTIFICATION ............................... 2-1

2.1 INTRODUCTION .................................................... 2-1

2.2 IUID BENEFITS ..................................................... 2-1

2.3 IUID BASICS ....................................................... 2-1

2.4 IUID DATA MATRIX DEFINITIONS....................................... 2-2

2.4.1 Data Matrix......................................................... 2-2

2.4.2 Enterprise Identiﬁer ................................................... 2-2

2.4.2.1 Item.............................................................. 2-2

2.4.2.2 IUID ............................................................. 2-2

2.4.2.3 IUID Lifecycle ...................................................... 2-2

2.4.3 Unique Identiﬁcation .................................................. 2-3

3 UNIQUE ITEM IDENTIFICATION AND ENCODED DATA CHARACTERISTICS .............. 3-1

3.1 SCOPE............................................................ 3-1

3.2 CONSTRUCTS ...................................................... 3-1

3.2.1 Determining Construct Format ............................................ 3-1

3.2.1.1 Construct 1 ......................................................... 3-1

3.2.1.2 Construct 2 UII ...................................................... 3-2

3.2.1.3 25S for Remarks of Constructs 1 and 2 ...................................... 3-2

3.2.1.4 Other Constructs ..................................................... 3-2

4 UID LABEL SURFACE PREPARATION AND APPLICATION ............................ 4-1

4.1 INTRODUCTION .................................................... 4-1

4.2 UID DIRECT PART MARKING SURFACE PREPARATION....................... 4-1

4.3 UID LABEL APPLICATION ............................................. 4-2

4.4 UID LABELS WITH ADHESIVE BACKING APPLICATION PROCEDURES (TAPE) ..... 4-3

4.5 UID LABEL WITH RIVET/SCREW APPLICATION PROCEDURES ................. 4-3

4.6 PROTECTIVE COATINGS AND COVERS................................... 4-3

4.7 UID LABEL REMOVAL ............................................... 4-3

5 INDIRECT PART MARKING ................................................... 5-1

5.1 INDIRECT PART MARKING USING DATA PLATES AND LABELS ................ 5-1

5.1.1 Foreign Object Damage ................................................. 5-1

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Chapter Page

5.1.2 Environment ........................................................ 5-1

5.1.3 Dissimilar Metals ..................................................... 5-1

5.1.4 Wear Resistance...................................................... 5-1

5.1.5 Location and Size of Data Plate ........................................... 5-1

5.1.6 Attaching Data Plate................................................... 5-1

5.2 PLATE MANUFACTURING............................................. 5-1

5.2.1 Aluminum Foil Labels ................................................. 5-2

5.2.2 Aluminum ID Plates................................................... 5-2

5.2.3 Photosensitive Anodized Aluminum ID Plates (Metal Photo)........................ 5-2

5.2.4 AlumaMark ID Plates .................................................. 5-2

5.2.5 Anodized Aluminum ID Plates ............................................ 5-2

5.2.6 DuraBlack Aluminum ID Plates ........................................... 5-2

5.2.7 Stainless Steel ID Plates ................................................ 5-2

5.2.8 Polyacrylic Labels .................................................... 5-2

5.2.9 Polyimide Labels ..................................................... 5-3

5.2.10 Thermal Transfer Printed Labels........................................... 5-3

5.3 ALTERNATIVE MARKING METHODS .................................... 5-3

5.3.1 Bag and Tag ........................................................ 5-3

5.3.2 Virtual Marking ...................................................... 5-3

6 DIRECT PART MARKING ..................................................... 6-1

6.1 INTRODUCTION .................................................... 6-1

6.2 DOT PEEN MARKING ................................................ 6-1

6.2.1 Special Considerations ................................................. 6-1

6.3 ELECTROCHEMICAL ETCHING ......................................... 6-2

6.3.1 Equipment.......................................................... 6-2

6.3.2 Methodology ........................................................ 6-2

6.3.4 AC vs. DC Current.................................................... 6-3

6.3.5 Advantages ......................................................... 6-3

6.3.6 Disadvantages ....................................................... 6-3

6.4 LASER MARKING ................................................... 6-3

6.4.1 Laser Types......................................................... 6-4

6.4.1.1 Femto Lasers........................................................ 6-4

6.4.1.2 YAG ............................................................. 6-4

6.4.1.3 CO

Lasers ......................................................... 6-4

6.4.2 Laser Schedules ...................................................... 6-4

6.4.3 Considerations ....................................................... 6-4

6.4.4 Heat Affected Zone.................................................... 6-4

7 VERIFICATION, VALIDATION, AND INSPECTION ................................... 7-1

7.1 VERIFICATION AND VALIDATION ....................................... 7-1

7.1.3 Veriﬁcation/Validation Batch Sampling ...................................... 7-1

7.2 NEWLY MANUFACTURED UID LABEL AND DATA PLATE INSPECTION........... 7-1

7.3 NEWLY MARKED DPM UID INSPECTIONS REQUIREMENTS ................... 7-1

7.3.1 Inspect DPM Marked Assets ............................................. 7-1

7.3.1.1 Incorrect or Nonconforming DPM Marked Items................................ 7-2

7.4 INSPECTION OF EXISTING UID LABELS ON ITEMS RETURNING FOR

MAINTENANCE................................................... 7-2

7.5 INSPECTION OF EXISTING DPM DATA MATRIX AND UII ON ITEMS RETURNING

FOR MAINTENANCE ............................................... 7-2

7.5.1 Visually Inspect Incoming Item for Existing IUID Data Matrix ...................... 7-2

TO 00-25-260

TABLE OF CONTENTS - CONTINUED

LIST OF ILLUSTRATIONS

Number PageTitle

2-1 The UII Lifecycle......................................................... 2-4

2-2 ECC 200 Data Matrix ...................................................... 2-4

3-1 Flowchart for Choosing Constructs ............................................. 3-2

3-2 Illustration of Construct 1 ................................................... 3-3

3-3 Illustration of Construct 1 With Supplemental Data Format............................. 3-3

3-4 Construct 1 With TEI Format ................................................. 3-4

3-5 Construct 1 With TEI Format ................................................. 3-4

3-6 Illustration of Construct 2 Formatting ........................................... 3-5

3-7 Illustration of Construct 2 With DUNS as EID ..................................... 3-5

3-8 Illustration of Construct 2 With DoDAAC as EID ................................... 3-6

3-9 Illustration of Construct 2 With TEI Format ....................................... 3-6

3-10 Illustration of Construct 2 With TEI Format and Enterprise Other Than Manufacturer CAGE as

EID................................................................ 3-7

3-11 Illustration of Next Generation Serialization for 25V Department of Defense Construct.......... 3-8

5-1 Illustration of Thermal Printer ................................................ 5-3

6-1 Dot Peening............................................................. 6-5

6-2 Electrochemical Etching Equipment............................................. 6-5

6-3 Illustrations of AC Current on a Ferrous Parent Material Type........................... 6-6

6-4 Diagram of Heat Affected Zone ............................................... 6-6

LIST OF TABLES

Number PageTitle

2-1 Characteristics of a UII ..................................................... 2-3

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iii/(iv blank)

INTRODUCTION

1 PURPOSE.

This technical manual provides guidance and information for the following: Air Force (AF) Item Unique Identiﬁcation

(IUID) program asset marking and tracking; basics of IUID, Unique Item Identiﬁer (UII) characteristics, surface preparation

and IUID label application, indirect part marking, Direct Part Marking (DPM), veriﬁcation, validation, and inspection. It is

not intended to be used as a technical guide to manufacture Unique Identiﬁcation (UID) labels. Instructions for safe and

proper storage, handling, inspection, testing, maintenance, and preparation for use are also provided.

1.1 This methods and procedures manual applies to the Department of the AF depot level organizations responsible for the

use, maintenance, servicing, and/or storage of legacy assets that require UID. This manual does not authorize the marking of

legacy assets owned by other government organizations. The guidance provided by this document may be referenced or

incorporated into maintenance guides as approved by the Engineering Source Authority (ESA) responsible for the legacy

items to be marked.

2 USE OF THIS MANUAL.

The table of contents indicates chapter, paragraph, title, and page numbers to facilitate location of information. Illustrations,

tables, and diagrams, when applicable, are located throughout the publication to supplement the text material. A list of

illustrations and a list of tables indicate the number, title, and location. Abbreviations, phrases, and words which are on a

decal, a placard or an engraving are set forth in the text exactly as they appear on the decal, the placard or the engraving.

3 SCOPE.

This manual is intended to be used in conjunction with item speciﬁc Technical Orders (TOs) for depot and contractual level

repairs. When a conﬂict occurs between this manual and the item speciﬁc TO, the item speciﬁc TO will take precedence.

4 DEFINITIONS.

The word SHALL is used to express a provision that is binding. The words SHOULD and MAY are used when it is

necessary to express nonmandatory provisions. WILL may be used to express a mandatory declaration of purpose or when it

is necessary to express a future event.

5 ABBREVIATIONS.

All abbreviations used in this manual are in accordance with JCS Pub 1-02, ASME Y14.38M, and the GPO Styleguide for

use on drawings, speciﬁcations, standards, and in technical documents, except as follows:

AC Alternating Current

ADC Automatic Data Capture

AFI Air Force Instruction

AFOSH Air Force Occupational Safety and Health

AFMCI Air Force Material Command Instruction

AI Application Identiﬁer

AIM Association for Automatic Identiﬁcation and Mobility

AIMT Asset Inventory Management Tool

AF Air Force

AFTO Air Force Technical Order

AIS Automated Information System

AIT Automatic Identiﬁcation Technology

AL Aluminum

AMT Asset Marking and Tracking

ASCII American Standard Code for Information Interchange

TO 00-25-260

CAD Computer Aided Design

CAFDEx Centralized Access for Data Exchange

CAGE Commercial and Government Entity

CEMS Central Engine Management System

Carbon Dioxide

CSA Canadian Standards Association

°C Degrees Celsius

°F Degrees Fahrenheit

DC Direct Current

DFARS Defense Acquisition Regulations System

DLIS Defense Logistics Information System

DoD Department of Defense

DoDI Department of Defense Instruction

DPI Dots Per Inch

DPM Direct Part Marking

DRILS Defense Repair Information Logistics System (G200)

DRMS Defense Reutilization and Marketing Service

DRU Direct Reporting Unit

DUNS Dunn and Bradstreet Data Universal Numbering System

ECC Error Correction Code

ECE Electrochemical Etching

ECM Electrochemical Marking

EDCL Enterprise Data Collection Layer

EDM Electrical Discharge Machining

EID Enterprise Identiﬁer

ESA Engineering Source Authority

ESD Electrostatic Discharge

ESDS Electrostatic Discharge Sensitive

FAR Federal Acquisition Regulation

FOC Full Operational Capability

FOD Foreign Object Damage

FOM Facilitate Other Maintenance

GFP Government Furnished Property

GIAI Global Individual Asset Identiﬁer

GSA General Services Administration

GTIN Global Trade Identiﬁcation Number

HRC Rockwell Hardness C Scale

HAF Headquarters Air Force

HAZ Heat Affected Zone

HRI Human Readable Information

IAC Issuing Agency Code

IAW In Accordance With

ID Identiﬁcation

IEC International Electrotechnical Commission

IET Industrial Engineer Technician

IMM Intrusive Marking Method

IMPRESA Depot Maintenance Repair Overhaul System

ISO International Organization for Standardization

IUID Item Unique Identiﬁcation

JEDMICS Joint Engineering Data Management Information and Control System

LASER Light Ampliﬁcation by Stimulated Emission of Radiation

LCD Liquid Crystal Display

TO 00-25-260

LDMS Lean Depot Management System

LENS Laser Engineered Net Shaping

LIVD Laser Induced Vapor Deposition

LMJ Liquid Metal Jet

LPM Label Part Marking

MAJCOM Major Command

MIL-STD Military Standard

MPTO Methods and Procedures Technical Order

MRI Machine-Readable Information

ND:YAG Neodymium-Doped Yttrium Aluminum Garnet

NIMM Non-Intrusive Marking Method

NWRM Nuclear War Readiness Material

OI Operating Instruction

OPM Opportunistic Parts Marking

OSD Office of Secretary of Defense

OSHA Occupational Safety and Health Administration

OSS&E Operational Safety Sustainment and Effectiveness

PCB Printed Circuit Board

PMO Program Management Office

PN Part Number

PPE Personal Protective Equipment

PP&E Property, Plant, and Equipment

PVC Polyvinyl Chloride

PVF Polyvinyl Fluoride

PWB Printed Wiring Board

RFID Radio Frequency Identiﬁcation

SAM Serialized Asset Management

SCR Sequence Control Register

SDS Safety Data Sheet

SIM Serialized Item Management

SMR Source, Maintenance, and Recoverability

SNT Serial Number Tracking

SPO System Program Office

TCTO Time Compliance Technical Order

TM Technical Manual

TO Technical Order

TRIAD Three tier IUID marking software: Template, MIL-STD Compliance, Data Capture and Migration

UID Unique Identiﬁcation

UII Unique Item Identiﬁer

UL Underwriters Laboratory, Inc

UV Ultraviolet

VII Virtual Item Identiﬁcation

WCD Work Control Document

YAG Yttrium Aluminum Garnet

2-D Two Dimensional

TO 00-25-260

vii

6 LIST OF RELATED PUBLICATIONS.

These publications contain information in support of this technical manual and are required to accomplish the prescribed

maintenance.

List of Related Publications

Number Title

A-A-208 Ink, Marking Stencil, Opaque (Porous and Nonporous Surfaces)

A-A-50271 (MIL-P-514D) Commercial Item Description, Plate, Identiﬁcation

A-A-56032 Ink, Marking, Epoxy Base

AF IUID Class IX Repairables Legacy Marking Plan April 2012

AFI 63-101 Acquisitions and Sustainment Life Cycle Management

AFI 90-821 Hazard Communication (HAZCOM) Program

AFI 91-301 Air Force Occupational and Environmental Safety, Fire Protection, and Health

(AFOSH) Program

AFMAN 91-203 Air Force Occupational Safety, Fire and Health Standards

AFMCI 63-XXX Supporting document to AFI 63-101, when published

AFOSH STD 91-501 Air Force Consolidated Occupational Safety Standard

AIM-BC1 Uniform Symbology Speciﬁcation Code 39

AIM DPM-1-2006 Direct Part Mark Quality Guidance

ANSI/ESD S20.20 Protection of Electrical and Electronic Parts, Assemblies and Equipment (Excluding

Electrically Initiated Explosive Devices)

ANSI MH10.8.2 American National Standard Data Identiﬁer and Application Identiﬁer Standard

ANSI MH10.8.7 Labeling and Direct Product Marking with Linear Bar Code and Two Dimensional

Symbols

ASME Y14.38M Abbreviations and Acronyms Revision and Redesignation of ASME Y1.1

ASTM D 3330 Standard Test Method for Peel Adhesion of Pressure-Sensitive Tape

ASTM D 3951 Standard Practice for Commercial Packaging

ASTM D 5181 Standard Test Method for Abrasion Resistance of Printed Matter by the GA-CAT

Compression Abrasion Tester

AS9132A Data Matrix Quality Requirements for Parts Marking

Department of Defense Acquisition Guidebook

Department of Defense Di-

rective 4140.1

Material Management Policy

Department of Defense Di-

rective 5000.1

Defense Acquisition Systems

Department of Defense Guidelines for the Virtual Unique Item Identiﬁer (UII)

Department of Defense In-

struction 5000.64

Accountability and Management of DoD- Owned Equipment and Other Accountable

Property

Department of Defense In-

struction 7000.14

Defense Financial Management Regulation

DFARS 252-211-7003 Item Identiﬁcation and Valuation DoD Guide to Uniquely Identifying Items; Assuring

Valuation, Accountability and Control of Government Property (latest revision)

DOD-HDBK-263 Electrostatic Discharge Control Handbook for Protection of Electrical and Electronic

Parts, Assemblies and Equipment (Excluding Electrically Initiated Explosive Devices)

DODI 8320.04 Item Unique Identiﬁcation (IUID) Standards for Tangible Personal Property

DRMS-R 5000.6 Compliance With Environmental Laws and Regulations

FAR, Part 45 Federal Acquisition Requisition for Government Property

ISO/IEC 15415 Information Technology - Automatic Identiﬁcation and Data Capture Techniques - Bar

Code Print Quality Test Speciﬁcation - Two-dimensional Symbols

ISO/IEC 15416 Information Technology - Automatic Identiﬁcation and Data Capture Techniques - Bar

Code Print Quality Test Speciﬁcation - Linear Symbols

ISO/IEC 15417 Information Technology - Automatic Identiﬁcation and Data Capture Techniques -

Code 128 Bar Code SymbologySpeciﬁcation

TO 00-25-260

viii

List of Related Publications - Continued

Number Title

ISO/IEC 15418 Information Technology - Automatic Identiﬁcation and Data Capture Techniques -

GS1 Application Identiﬁers and ASC MH10 Data Identiﬁers

ISO/IEC 15434 Information Technology - Transfer Syntax for High Capacity ADC Media

ISO/IEC 16022 Information Technology - Automatic Identiﬁcation and Data Capture Techniques -

Data Matrix Bar Code Symbology Speciﬁcation

LIA Z136.1 Safe Use of Lasers

MIL-DTL-15024F Type L Detail Speciﬁcation Plates, Tags, and Bands for Identiﬁcation of Equipment, General

Speciﬁcation

MIL-DTL-31000 Technical Data Package, General Speciﬁcation for

MIL-HDBK-1812 Type Designation, Assignment and Method for Obtaining

MIL-PRF-131 Barrier Material, Water Vaporproof, Greaseproof, Flexible, Heat-Sealable

MIL-PRF-61002 Pressure-sensitive Adhesive Labels for Bar Codes, Performance Speciﬁcation

MIL-PRF-87937 Type III Qualiﬁed Product List, Cleaning Compound, Aerospace Equipment

MIL-STD-129 Military Marking for Shipment and Storage

MIL-STD-130 DoD Standard Practice Identiﬁcation Marking of U.S. Military Property

MIL-STD-1686 Electrostatic Discharge Control Program for Protection of Electrical and Electronic

Parts, Assemblies and Equipment (Excluding Electrically United Explosive Devices)

MIL-STD-202 Electronic and Electrical Component Parts Test Method Standard

MIL-STD-889B Military Standard Dissimilar Metals

NASA-HDBK-6003 Application of Data Matrix

NASA-STD-6002 Applying Data Matrix Identiﬁcation Symbols on Aerospace Parts

TT-I-735 Isopropyl Alcohol Speciﬁcation

00-25-195 Source, Maintenance, and Recoverability Coding of Air Force Weapons, Systems, and

Equipment

00-25-234 General Shop Practice Requirements for the Repair, Maintenance, and Test of Elec-

tronic Equipment

00-5-1 AF Technical Order System

1-1-169 Aircraft Weapons Systems Cleaning and Corrosion Control

1-1-691 Cleaning and Corrosion Prevention and Control, Aerospace and Nonaerospace Equip-

ment

1-1-8 Technical Manual Application and Removal of Organic Coatings, Aerospace and

Nonaerospace Equipment

7 LIST OF APPLICABLE TIME COMPLIANCE TECHNICAL ORDERS (TCTO).

None.

8 IMPROVEMENT REPORTS.

NOTE

As used in this TO, MAJCOM includes Field Operating Agencies (FOAs) and Direct Reporting Units (DRUs).

HQ USAF/A4LX is responsible for establishing basic TCTO policy and for approving policy and procedure changes.

Recommended changes to this manual shall be submitted in accordance with TO 00-05-01, Technical Manual (TM) Change

Recommendation and Reply or the Joint Computer-aided Acquisition and Logistics Support (JCALS) system Recommend a

TM Change process In Accordance With (IAW) TO 00-5-1, AF Technical Order System, to the TO Manager, 416 SCMS/

GUBAB, 6071 Gum Lane, Bldg 1223, Hill AFB, Utah 84056.

TO 00-25-260

ix/(x blank)

SAFETY SUMMARY

1 GENERAL SAFETY INSTRUCTIONS.

This manual describes physical and chemical processes which may cause injury or death to personnel or damage to equip-

ment if not properly followed. This safety summary includes general safety precautions and instructions that must be

understood and applied during operation and maintenance to ensure personnel safety and protection of equipment. Prior to

performing any task, the WARNINGs, CAUTIONs, and NOTEs included in that task shall be reviewed and understood.

2 WARNINGS, CAUTIONS, AND NOTES.

WARNINGs and CAUTIONs are used in this manual to highlight operating or maintenance procedures, practices, conditions

or statements which are considered essential to protection of personnel (WARNING) or equipment (CAUTION). WARN-

INGs and CAUTIONs immediately precede the step or procedure to which they apply. WARNINGs and CAUTIONs consist

of four parts: heading (WARNING or CAUTION), a statement of the hazard, minimum precautions, and possible result if

disregarded. NOTEs are used in the manual to highlight operating or maintenance procedures, practices, conditions or

statements which are not essential to protection of personnel or equipment. NOTEs may precede or follow the step or

procedure, depending upon the information to be highlighted. The headings used and their deﬁnitions are as follows:

Highlights an essential operating or maintenance procedure, practice, condition, statement, etc., which, if not strictly

observed, could result in injury to or death of personnel or long-term health hazards.

Highlights an essential operating or maintenance procedure, practice, condition, statement, etc., which, if not strictly

observed, could result in damage to or destruction of equipment or loss of mission effectiveness.

NOTE

Highlights an essential operating condition or maintenance procedure, condition or statement.

3 SAFETY PRECAUTIONS.

Some general equipment may be outlined in this technical order. Follow all safety precautions and guidelines as outlined in

the instruction manuals for each individual pieces of equipment. In addition, operators should be thoroughly familiar with

applicable safety regulations as stated in AFI 91-301.

3.1 The following are general safety precautions that are not related to any speciﬁc procedure and, therefore, do not appear

elsewhere in this technical manual. These are general safety precautions and instructions that personnel must understand and

apply during many phases of operation and maintenance to ensure personal safety and health and the protection of Air Force

property.

• WEAR PROTECTIVE CLOTHING. Wear protective clothing (gloves, apron, etc.) approved for the materials and

tools being used.

• USE OF SAFETY APPROVED EQUIPMENT. When cleaners are being applied, approved explosion-proof lights,

blowers, and other equipment shall be used. Ensure ﬁre-ﬁghting equipment is readily available and in working

order.

TO 00-25-260

• GIVE CLEANERS SPECIAL CARE. Keep cleaners in approved safety containers and in minimum quantities.

Discard soiled cleaning cloths into safety containers.

• KEEP AWAY FROM LIVE CIRCUITS. Maintenance personnel must at all times observe all safety regulations. Do

not replace components or make adjustments inside the equipment with the high-voltage supply turned on. Under

certain conditions, dangerous potentials may exist when the power control is in the off position due to charges

retained by capacitors. To avoid casualties, always remove power and discharge and ground a circuit before touch-

ing it.

• DO NOT SERVICE OR ADJUST ALONE. Under no circumstances should any person reach into or enter the

enclosure for the purpose of servicing or adjusting the equipment except in the presence of someone who is capable

of rendering aid.

• RESUSCITATION. Personnel working with or near high voltages should be familiar with modern methods of

resuscitation. Cardiopulmonary resuscitation training requirements are outlined in AFMAN 91-203. Information

and training sources may be obtained by the installation Medical Group, American Red Cross or other appropriate

organization.

• USE OF CHEMICALS. Multiple chemicals may be used in various IUID marking procedures as called out in this

TO. Read all SDS forms prior to their use. Strict adherence to the guidelines of the SDS and local shop safety

procedures are mandatory.

TO 00-25-260

xii

CHAPTER 1

INTRODUCTION AND GENERAL INFORMATION

1.1 INTRODUCTION.

Item Unique Identiﬁcation (IUID) marking is a Department of Defense (DoD) mandate requiring compliance with numerous

published directions and guidance. IUID marking quality and process standards are in accordance with MIL-STD-130( ).

Other governing publications examples are, DODI 8320.04, AFI 63-101. In addition, AFMCI XX- XXX will support above

governance when published.

1.1.1 The Air Force (AF) IUID Program Management Office (PMO) has issued the AF IUID Class IX Repairables Legacy

Marking Plan (April 2012). This plan identiﬁes the criteria for determination of which types of AF items require IUID

marking. Many additional AF items will require marking as determined by the responsible Engineering Source Authority

(ESA). Changes to applicable technical data will direct that marking.

1.1.2 The Office of Secretary of Defense (OSD) and DoD has mandated all AF depot repair centers to be programmatic

Full Operational Capability (FOC) by 31 December 2015. Programmatic FOC as deﬁned is all unmarked legacy items

entering a maintenance facility and requiring IUID and will exit with a qualifying Unique Item Identiﬁer (UII) if the level of

maintenance facilitates that marking opportunity. Within the AFMC depot complexes, FOC is deﬁned as IUID marking

maturity has been achieved to include the following elements:

a. AF Program Offices and engineering have processed technical marking requirement data and it is in place.

b. Maintenance documents such as Work Control Documents (WCDs), process orders, or other depot technical docu-

ments have been updated to reﬂect the marking requirement.

c. Marking and veriﬁcation equipment and ﬂoor space are available to meet IUID requirements, or outsourcing processes

have been established.

d. Marking technician and equipment maintenance technician training has been completed.

e. All bioenvironmental and safety requirements have been met.

f. Marking materials have been identiﬁed and are available per depot practices.

g. MIL-STD-130( ) and DoD IUID registration compliance processes are ensured.

1.1.2.1 Policy further states no items require removal from service or inventory for the sole purpose of IUID marking. In

order to meet the 31 December 2015 FOC date, the AF will have all requirements, processes, and capabilities for IUID

marking in place to ensure all required AF items will be marked at depot trigger events. Unique identiﬁcation is intended as

a means for the Air Force’s logistics to have tracking capability for use in the DoD.

1.2 ASSET MARKING AND TRACKING.

The Asset Marking and Tracking (AMT) Program Office deﬁnes AMT as the capability to track assets individually through-

out the supply chain and capture signiﬁcant lifecycle events which have the potential to signiﬁcantly improve the AF asset

management process.

1.2.1 This cradle-to-grave AF logistics vision for system repairables, elected consumables, engines, equipment, and other

designated properties is to provide visibility, accountability, and status of high value parts at any given time.

1.2.2 Advantages of AMT. AF logistics and supply chain processes have not evolved to leverage modern automated

capabilities over the past few decades. While areas of traceability have been developed, poor visibility and numerous gaps

still exist within the AF supply chain. The need for a functioning enterprise capability for asset visibility still remains.

TO 00-25-260

1-1

1.2.2.1 AMT will revolutionize the ability to maintain system conﬁguration control. AMT enables the AF to have total

asset visibility through the acquisition, transportation, supply, maintenance, and disposal processes. Component level visibil-

ity provides valuable data such as part history, maintenance usage, repair dates, overhaul, and operational locations. This

consolidated asset history will greatly enhance lifecycle management for AF items.

1.2.2.2 Current information such as asset location will be beneﬁcial for numerous AF functional users. A prime use case is

Time Compliance Technical Order (TCTO) compliance on a part that was manufactured or designed incorrectly. TCTOs may

easily be tracked by the System Program Office (SPO) through the Unique Identiﬁcation (UID) system to ensure all

applicable items have complied with TCTO requirements.

1.2.2.3 Transportation and delivery are often a concern with Nuclear War Readiness Material (NWRM). Through the use

of the AMT and UID markings, critical material can be shipped and tracked with up-to-date information about the current

location of unique items. Signiﬁcant beneﬁts associated with complete and accurate item visibility are critical to the future of

the Air Force. Some of these beneﬁts may include system and supply chain program office operations, engineering analysis

efforts, conﬁguration management, counterfeit part control, maintenance data collection, requirements forecasting, budget-

ing, and item warranty.

1.3 WAY FORWARD.

AF established technical data compliance authorization identiﬁes the level of organizational entities authorized and man-

dated for the level of repair to be accomplished. An example of this level of repair may be called out by the Source,

Maintenance, and Recoverability (SMR) code. The SMR authorizes intermediate, organizational, or depot level removal and

repair actions. IUID marking requirements should only be accomplished by the authorized level of repair speciﬁed per the

applicable Technical Order (TO). Intermediate and organizational levels of repair are not authorized to apply depot level

marking without direct guidance speciﬁcally approved by the conﬁguration manager or cognizant engineering authority to

that entity. An item removed to Facilitate Other Maintenance (FOM) is not authorization for IUID marking.

1.3.1 IUID and UII data association, data capture, integrity, and migration to AF databases and the DoD IUID Registry are

critical to the concepts and beneﬁts of the UID program. Use of AF approved portfolio managed systems may be utilized to

accomplish and secure the IUID/UII data. Systems such as Asset Inventory Management Tool (AIMT), Centralized Access

for Data Exchange (CAFDEx), Central Engine Management System (CEMS), Defense Repair Information Logistics System

(G200) (DRILS), Enterprise Data Collection Layer (EDCL), Depot Maintenance Repair Overhaul System (IMPRESA), Lean

Depot Management System (LDMS), and Three tier IUID marking software: Template, MIL-STD Compliance, Data Cap-

ture and Migration (TRIAD) are examples.

1.3.2 IUID association and registration data are required and all data are provided to the AF IUID Program Management

Office (PMO) through one of the previously stated systems or any other AF approved system to associate marking data to the

item being marked and sent to the DoD IUID Registry.

1.3.3 MIL-STD-130 referenced guidance will deﬁne the data matrix standards for IUID marking. This standard identiﬁes

applicable International Organization for Standardization (ISO) speciﬁcations to produce compliant syntax and symbology

for 2-D data matrices.

1.3.4 Validation and Veriﬁcation needs to be addressed and is a critical onetime requirement following the production of a

compliant 2-D bar code. Additional information on this topic is covered in subsequent chapters.

1.3.5 MIL-STD-130, DoD Guidance, Department of Defense Instruction (DoDI), Air Force Instruction (AFI), AF guid-

ance, and applicable technical data govern the majority of IUID compliance direction. There will be speciﬁc cases where

locally developed, Operational Instructions (OIs), or local process orders will be utilized to facilitate IUID compliance.

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CHAPTER 2

INTRODUCTION TO ITEM UNIQUE IDENTIFICATION

2.1 INTRODUCTION.

Item Unique Identiﬁcation (IUID) is accomplished by marking each qualifying item with a 2-D data matrix symbol and

registering the Unique Item Identiﬁer (UII) and asset pedigree data in the Department of Defense (DoD) IUID Registry.

Because the data matrix symbol is machine- readable, IUID marking greatly reduces data entry error and improves the

accuracy of inventory and acquisition records. Ensure item data is correct so machine-readability can maintain the correct

data throughout the item’s lifecycle.

2.1.1 The data matrix is encoded with data element(s) necessary to construct a UII, which is the globally unique alpha-

numeric code assigned to every qualifying item in DoD inventory. See Chapter 3 for details.

2.1.2 UIIs, along with a set of select item identiﬁcation data, are stored in the DoD IUID Registry, which allows controlled

access to information such as acquisition cost and lifecycle support data. The DoD IUID Registry is hosted and operated by

the Defense Logistics Information Service (DLIS) and serves as the authoritative source for item acquisition cost and

required acquisition-based pedigree data.

2.2 IUID BENEFITS.

DoD services must uniquely identify qualifying items to provide for better asset accountability, valuation, and lifecycle

management. IUID provides the DoD with the source data to facilitate and accomplish the following:

• Provide item visibility.

• Supply item data necessary for top-level logistics and engineering analysis.

• Provide an accurate source for property and equipment valuation/accountability.

• Improve access to historical data for use during systems design and throughout the life of an item.

• Provide better item intelligence for the warﬁghter in operational planning.

• Reduce workforce burden through increased productivity and efficiency.

• Assist in the identiﬁcation, segregation, and ultimate reduction of counterfeit items and parts.

2.3 IUID BASICS.

The UII is supplemental to prior markings on an item and as a minimum needs only to replicate UII-related information. The

chosen UII construct format will determine what information will be encoded. All qualiﬁed legacy items shall be marked in

accordance with approved IUID marking policies set forth by DoD Guide to Uniquely Identifying Items and other DoD

directives, MIL-STD-130, item speciﬁc technical orders, and the guidance outlined in this manual.

2.3.1 Items and their embedded components (circuit card assemblies, power supplies, transducers, etc.) may be marked

with a supplemental Unique Identiﬁcation (UID) label placed on or adjacent to the existing means of identiﬁcation (plate, tag

or other marking method). Do not cover any prior pertinent markings. If this is not possible, a suitable location on the item

must be determined that does not detract from its form, ﬁt, or function.

2.3.2 Engineering analysis of operating environmental conditions such as air-stream, chaffing, ﬂuid contamination, high-

pressure wash, repetitive impact, temperature, Foreign Object Damage (FOD), etc., must be taken into consideration when

determining marking methods, materials, and need of protective coatings that are best suited for each UID candidate. The

TO 00-25-260

2-1

use of supplemental, nonintrusive, additive marking of self-adhesive, nonmetallic polyacrylic labels or other forms of

thermal transfer materials is highly encouraged whenever possible. This reduces the depth of engineering analysis and

eliminates metallurgical testing, and the need to design and fabricate individual holding ﬁxtures required for intrusive UII

applications.

2.3.2.1 UID requirements are reﬂected in the Joint Engineering Data Management Information and Control System (JED-

MICS) drawings and/or original equipment drawings, if available, for legacy items. Item speciﬁc Technical Orders (TOs)

will have detailed information for the application/creation of the UID label.

2.4 IUID DATA MATRIX DEFINITIONS.

2.4.1 Data Matrix. (Figure 2-2) A data matrix is 2-D, machine-readable barcode for encoding data. Many types of data

matrices exist and are used in various applications. The ECC 200 data matrix described in ISO/IEC 16022 is the only one

required in DoD UID program. The ECC 200 matrix is well suited for IUID due to its unique properties. The matrix has a

higher information density than 1-D barcodes and most other 2-D matrices, with up to 2,335 alphanumeric characters. It can

be scaled up or down to ﬁt within available marking space. The UID matrix can be applied using adhesive label, rigid plate,

or directly on the surface using any one of multiple marking methods and technologies. The ECC 200 data matrix consists

of uniform rows and columns of light and dark cells. The matrix is commonly square, but may be rectangular in shape in

cases where there is little room on the item, or the item is unusually shaped. The matrix can range in size from 10x10 to

144x144 cells and can be scaled to be very small to extremely large.

2.4.1.1 Primary characteristics are as follows:

a. Cells are individual small squares or dots contained in the data matrix. Cells represent bits or binary digits of encoded

information that contain the matrices machine-readable data. Contrasting cells are turned ON or OFF.

b. Clocking Pattern. A broken L-shaped pattern consisting of one row and one column of alternating dark and light

cells. The clocking pattern is used by veriﬁers and readers to determine the size of the data matrix and its orientation.

c. Data Region. The area framed by the clocking pattern and ﬁnder pattern that contains dark or light cells. These cells

are used to encrypt the UII data.

d. Finder Pattern. A solid L-shaped pattern consisting of one column and one row of contrasting cells. The ﬁnder pattern

is used by both veriﬁers and readers to locate, identify orientation, and measure the data matrix.

e. Quiet Zone. An area kept free from all markings or interfering obstructions. The quiet zone must be at least one cell

width wide around the entire data matrix. The quiet zone isolates the data matrix.

2.4.2 Enterprise Identiﬁer. The Enterprise Identiﬁer (EID) is a unique identiﬁcation code assigned to an activity or

organization by registered issuing agencies such as Commercial and Government Entity (CAGE) code, Department of

Defense Activity Address Code (DoDAAC), or Dun & Bradstreet’s Data Universal Numbering System (DUNS). An enter-

prise can be an entity such as manufacture, design activity, depot, supplier, program management office, or third party.

Typically within the depot complexes, the EID will be that depot’s cage code and will be encoded in the generated UII. In

commercial applications, DoDAACs and DUNS, etc., are acceptable to be encoded in the generated UII and will not

necessarily conform to the 5-character CAGE code. The entity generating the UII is responsible for guaranteeing the

uniqueness of that UII, as produced under its authority, by using its EID. No entity is authorized to use another’s EID unless

given written permission in a Memorandum of Agreement (MOA) or called out in the item’s technical data package(s).

2.4.2.1 Item. An item is an asset in the AF inventory consisting of a group of subassemblies, components, or constituent

part(s).

2.4.2.2 IUID. IUID is the system of globally and unambiguously distinguishing one item from all other items the DoD

buys or owns. This allows the DoD to track identically made items individually throughout their lifecycles. With IUID, the

DoD can consistently capture the value of all individual items it buys, trace these items during their use, combat counter-

feiting of parts, and associate valuable business intelligence to an item throughout its lifecycle.

2.4.2.3 IUID Lifecycle. If it is not realistic for the UID label to survive the entire lifecycle of the item or the rebuild

process, the item will be marked in such a way that the UID label will survive its expected lifecycle up to the next

maintenance event. The item can then be remarked using the original UII data.

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2.4.3 Unique Identiﬁcation. UID is a program for establishing globally unique and unambiguous identiﬁers within the

DoD, which serves to distinguish a discrete entity or relationship from other like and unlike entities or relationships.

2.4.3.1 UII is the unique and unambiguous identiﬁcation data encoded within an ECC 200 data matrix. The UII is

associated only once to an item and the data within remains unique to that item for the entire lifecycle of the item. See Table

2-1 for the characteristics of a UII, Figure 2-1 for an illustration of the UII lifecycle, and Figure 2-2 for the ECC 200 data

matrix.

2.4.3.2 Validation is the process for determining that the machine-readable symbol contains the required information and

is encoded with the correct semantics and syntax. IUID validation is performed using an electronic/optical imaging device

capable of reading 2-D data matrix information.

2.4.3.3 Veriﬁcation combines validation of the semantics and syntax in addition to the quality of a machine-readable

symbol. Veriﬁcation assigns a grade to the results indicating acceptance in accordance with the applicable MRI- protocol

quality control document. It is performed using an electronic/optical veriﬁcation device and includes methods that are largely

visual in nature.

2.4.3.4 Data string is the machine-readable encoded data. At a minimum, it contains the UII, but may contain additional

pertinent data in the data matrices.

Table 2-1. Characteristics of a UII

A UII Is: A UII Is Not:

A globally unique unambiguous item identiﬁer A physical method of communicating data, such as Radio

Frequency Identiﬁcation (RFID) tags, contact memory but-

tons, linear bar codes, or 2-D data matrices

Permanent through life A replacement for the national stock number

Created by concatenating a string of speciﬁc data elements Intelligent standalone data that contains information about

an item

A means of capturing and utilizing lifecycle data Independent

Stored within a 2-D matrix - acts as an access key to other

information

A storage for an item’s total history

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Figure 2-1. The UII Lifecycle

Figure 2-2. ECC 200 Data Matrix

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CHAPTER 3

UNIQUE ITEM IDENTIFICATION AND ENCODED DATA CHARACTERISTICS

3.1 SCOPE.

Due to Department of Defense (DoD) policy and guidance, as well as MIL-STD-130, much more latitude is given to private

industry for creation of Unique Item Identiﬁer (UII) formats. This chapter deﬁnes most formats expected to enter Air Force

(AF) legacy inventory from private industry.

3.2 CONSTRUCTS.

MIL-STD-130 governs UII constructs 1 and 2 as well as the various formats that may be used when creating an ECC 200

data matrix. The UII constructs and formats covered in this manual are DoD recognized and are commonly used by DoD

contractors, vendors, manufacturers, and repair depots. The following illustrated examples are not an all-inclusive list of

DoD recognized UII formats or accepted equivalents.

3.2.1 Determining Construct Format. Before producing Item Unique Identiﬁcation (IUID) labels, reference the proper

technical data to ensure there is an IUID requirement for the asset. If no construct or format has been speciﬁed in the

technical data, use Figure 3-1 to determine which UII construct best applies. Keep in mind, asset accountability and

traceability should be at the forefront when selecting which UII construct is appropriate.

3.2.1.1 Construct 1. A construct 1 UII is derived from the combination of the issuing agency code, enterprise identiﬁer,

and a unique sequential alphanumeric string or item serial number. It is the responsibility of the enterprise producing a

construct 1 UII to ensure the serial/sequence number assigned is unique within the enterprise. This single data set will

provide the permanent identiﬁcation for the lifecycle of the item it is assigned to. See Figure 3-2 through Figure 3-5 for

examples of various formats of construct 1 UIIs.

3.2.1.1.1 Construct 1 Advantages. The advantage of using construct 1 IUID labels for marking legacy items is it allows

for the printing of mass-produced batches of nonpedigree data speciﬁc labels. The labels can be pre- produced and used as

needed on any asset without prior knowledge of speciﬁc asset pedigree data. This type of marking can be especially useful

for organizations that do not have the resources to produce their own IUID labels. Because there is no direct association

between the label and the assets being marked, the UII will need to be associated to the asset by using an asset tracking

database (see asset tracking section of this TO). This association shall be established at the time, or prior to, the label is

being applied to its assigned asset.

3.2.1.1.2 Construct 1 Disadvantages. The disadvantages of using construct 1 IUID labels are as follows: other than the

EID, they contain ambiguous data, in that there is no item speciﬁc identiﬁcation encoded in the data matrix. Supply points or

other agencies will not be able to glean any useful information from the data matrix. To have value, users need access to the

asset tracking database where the UII and its associated speciﬁc data is stored.

3.2.1.1.2.1 Another disadvantage is when a data matrix is damaged beyond readability or when missing, and the items

lack a serial number, it is virtually impossible to identify the original UII even with a tracking database.

3.2.1.1.3 Construct 1 With Supplemental Information. A construct 1 UII with supplemental information is derived the

same way as the construct 1 described in Paragraph 3.2.1.1. It contains the combination of the issuing agency code,

enterprise identiﬁer, and a unique sequential alphanumeric string or item serial number with additional supplemental infor-

mation. This supplemental information must have a data identiﬁer assigned in order to be properly encoded in the data

matrix. Examples of supplemental information may include manufacturer CAGE code, current part number, and item serial

number. These data elements are encoded in the data matrix but remain separate from the UII. It is the responsibility of the

enterprise producing a construct 1 UII with supplemental information to ensure the UII is unique within the enterprise. See

Figure 3-3 for an example of a construct 1 with supplemental data.

3.2.1.1.3.1 Construct 1 With Supplemental Information Advantages. This format allows the label to be scanned

where the readout will identify the association to a speciﬁc item independent of an asset tracking database. This is due to the

availability of the supplemental data. See Figure 3-3 for an example of a construct 1 with supplemental data.

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3-1

3.2.1.2 Construct 2 UII. A construct 2 UII is derived from a combination of issuing agency code, enterprise identiﬁer

original part number (part number at the time UII was created), and the asset’s unique serial number. The enterprise

producing the construct 2 UII is responsible for guaranteeing the accuracy and uniqueness of the UII. See Figure 3-6 through

Figure 3-10 for examples of various formats of construct 2 UIIs.

3.2.1.2.1 The advantage in using this IUID format is the matrix can be scanned and the asset identiﬁed independent of an

asset tracking database.

3.2.1.3 25S for Remarks of Constructs 1 and 2. In a 25S construct, a UID label had already been created but may need

to be recreated (remarked) because it is damaged or missing. Remarking an asset is required when a label is worn beyond

MIL-STD-130 readability standards. This generally involves a maintenance event when the label is removed for mainte-

nance activity, found to be worn or missing, and therefore there is a need to recreate a new label with the same UII. It is

recommended when such events occur, and when possible, to recreate the original UII using a 25S formatted IUID data

string. However, the 25S format can accommodate all UII formats regardless of original construct. Examples of remarked

UIIs using the 25S formatted data string are shown in Figure 3-2 through Figure 3-10.

3.2.1.4 Other Constructs. Other constructs do exist and may be used in areas of the DoD. If these other constructs are

required, refer to MIL-STD-130 (N) for the appropriate formatting.

Figure 3-1. Flowchart for Choosing Constructs

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3-2

Figure 3-2. Illustration of Construct 1

Figure 3-3. Illustration of Construct 1 With Supplemental Data Format

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3-3

Figure 3-4. Construct 1 With TEI Format

Figure 3-5. Construct 1 With TEI Format

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3-4

Figure 3-6. Illustration of Construct 2 Formatting

Figure 3-7. Illustration of Construct 2 With DUNS as EID

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3-5

Figure 3-8. Illustration of Construct 2 With DoDAAC as EID

Figure 3-9. Illustration of Construct 2 With TEI Format

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3-6

Figure 3-10. Illustration of Construct 2 With TEI Format and Enterprise Other Than Manufacturer CAGE as

EID

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3-7

Figure 3-11. Illustration of Next Generation Serialization for 25V Department of Defense Construct

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CHAPTER 4

UID LABEL SURFACE PREPARATION AND APPLICATION

4.1 INTRODUCTION.

NOTE

A label may be made of either a metallic or nonmetallic material and may be similar or dissimilar to the material

of the item being marked. Unique Identiﬁcation (UID) labels can be affixed to the identiﬁed item by any approved

means found in applicable technical data.

The term label is used to describe various types of UID marking materials and can be interchanged with the term plate (i.e.

tags, tape, data plate, name plate, ID plate, etc.).

NOTE

The following cleaning procedures for the surface where the label will be applied are recommendations only and

may not apply to all materials. For the uncommon or unusual cases where these guidelines do not apply, consult

the applicable technical data and/or contact appropriate engineering source authority for speciﬁc guidance.

4.1.1 Properly cleaning the surface will help prevent the onset of corrosion and contamination on the surface. Unclean or

contaminated surfaces may lead to premature label adhesive/mechanical fastener failures. In addition, these guidelines will

ensure the longest possible service life of the UID labels.

4.1.2 These procedures are for, but not limited to, the application of UID labels onto various components utilizing

self-adhesive labels. Label material covered includes polyacrylic ﬁlm, polyimide ﬁlm, and other forms of thermal transfer

label materials. These procedures can also be used to perform surface preparation for application of metallic labels. The

procedures will be applicable for various surfaces including anodized and/or alodined aluminum, electrical equipment, and

phenolic surfaces.

4.1.3 Unless otherwise speciﬁed by technical data, all cleaning and surface preparation of surfaces should be done in

accordance with TO 1-1-169 and local shop procedures. For cleaning and surface preparation of electrical equipment,

reference TO 00-25-234.

4.1.4 For most metallic surfaces, apply Isopropyl Alcohol, TT-I-735, or MIL-PRF-87937 Type III cleaning solution liber-

ally to surface, wipe surface until surface is free from visible contaminants, dirt, hydraulic ﬂuid, etc., and dry with cheese-

cloth. Allow area to dry before applying UID label.

4.2 UID DIRECT PART MARKING SURFACE PREPARATION.

Ensure marking surfaces are cleaned and free of all contaminants. When available, follow surface cleaning instructions per

applicable technical data and/or guidance from the Engineering Source Authority (ESA).

4.2.1 When preparing a surface for electrochemical etching, ensure surface does not have nonconductive coatings that

would prevent proper etching, such as anodized, painted, or corrosion-treated surfaces.

4.2.2 When preparing a surface for laser marking, ensure surface is clean of debris, dirt, and oil. Follow cleaning proce-

dures outlined in appropriate technical data prior to laser marking. Failure to properly clean item may cause mark to be

unveriﬁable or may potentially ignite oil, causing a safety hazard.

4.2.3 When dot peening components, ensure all parts are clean of debris or dirt. Follow all cleaning and surface prepara-

tions contained in the technical data to ensure that a good veriﬁable mark is achieved.

4.2.4 If speciﬁc surface cleaning instructions are not available, see MIL-PRF-87937 Type III for approved cleaning

solutions. Follow pre-cleaning instructions; removal of grease, oil, and other organic soils can be accomplished with virtu-

ally any solvent.

TO 00-25-260

4-1

4.2.5

Mechanical preparation is not appropriate on all metal surfaces. Check applicable technical data or contact the

ESA for authorization of methods. Damage could result and failure or scrapping out of components. Failure to

comply could result in damage to, or destruction of, equipment or loss of mission effectiveness.

Mechanical preparation methods such as wire brushing or rubbing with metal wool/Scotch Brite may be used to prepare

metal surfaces. Exercise care to ensure all abrasive materials (grit, sand, cloth, sand paper, or brushes) are free from

contaminants that may be spread or rubbed onto surface. Exercise care in using any mechanical method to prevent deep

gouges or rough surfaces which are not conducive to good bonding. Abrasives and debris should be wiped or water rinsed

from surface.

4.3 UID LABEL APPLICATION.

NOTE

See UID label surface preparation instructions in Paragraph 4.1.1 prior to UID label application.

UID label placement is dictated by the applicable technical order or engineering drawing and in most cases will show the

proper UID label number to be applied and its placement location. When initially determining where the label is to be

placed, the following guidelines will strongly inﬂuence the labels durability and usefulness. The following are general

considerations when determining placement:

a. Apply labels in protected areas when possible.

b. The labels should be readable when the marked item is in service.

c. The labels should be readable when the marked item is stowed.

d. Apply labels on ﬂat areas when possible.

4.3.1 Unless otherwise directed by applicable technical order(s) or engineering drawing(s), do not place labels (list not all

inclusive):

a. Over vents and/or air intakes.

b. Over other information.

c. Over fastener holes.

d. Over seams between separable pieces of the item.

e. On sealing surfaces.

f. On wearing or mating surfaces.

g. Near high heat sources.

h. Over lenses, optics, or sensors.

i. On surfaces with dimensional tolerance requirements.

j. In direct air streams (for example, leading edge of wings, helicopter rotors, exposed portions of turbine blades, and so

forth).

TO 00-25-260

4-2

k. On balance grinding surfaces

NOTE

Other placement considerations become important in specialized circumstances, such as when marking curved,

rough, shiny surfaces, and items that are sensitive to electrostatic discharge.

4.4 UID LABELS WITH ADHESIVE BACKING APPLICATION PROCEDURES (TAPE).

Clean hands before handling materials to ensure they are free from any dirt, oil, hydraulic ﬂuids, grease, etc.

4.4.1 Peel label from backing by bending and lifting at the corners and/or edges; avoid touching adhesive surface. Affix

label to component in area speciﬁed in the applicable technical order and apply pressure by rubbing label surface to

thoroughly activate adhesive and to work out any air bubbles between label and surface. If possible, allow label to set for a

minimum of 1 hour prior to any use of labeled/plate item. Maximum adhesion occurs approximately 24-48 hours after

applying the label for most adhesives.

NOTE

Ensure label is in correct position prior to allowing adhesive to touch component surface. Once adhesive has made

contact, it will be very difficult to remove without damaging or destroying it.

4.5 UID LABEL WITH RIVET/SCREW APPLICATION PROCEDURES.

Ensure all materials are the same if using rivets/screws to attach ID plates. Follow installation instructions in applicable

technical data when available. If materials are different, follow existing standards and guidance for dissimilar metals. See

MIL-STD-889( ).

4.6 PROTECTIVE COATINGS AND COVERS.

Protective coatings and covers can add resilience to UID labels by protecting the label, substrate, and adhesive from damage.

Coatings and covers should have a matte ﬁnish to minimize unwanted reﬂection off surface. If coatings are not applied in

accordance with applicable technical data, readability of the UID label may be affected. This includes validation/veriﬁcation

as required by MIL-STD-130( ).

4.7 UID LABEL REMOVAL.

If UID label is unreadable or damaged and needs to be replaced, the following removal method is suggested.

4.7.1 The least damaging method for removing labels applied with adhesive is with the use of dry ice. Applying dry ice to

label for 4-5 minutes causes adhesive to become brittle. The label is then tapped on the edge with a blunt object, preferably

a plastic scraper, to free it from item. Use care not to damage item. Any surface exposed after label removal should be

restored to its original condition before new label is applied.

TO 00-25-260

4-3/(4-4 blank)

CHAPTER 5

INDIRECT PART MARKING

5.1 INDIRECT PART MARKING USING DATA PLATES AND LABELS.

Indirect part marking for this Technical Order (TO) is deﬁned as a nonintrusive Item Unique Identiﬁcation (IUID) marking

method that will not adversely affect form, ﬁt, or function of item to be marked. Indirect part marking generally includes

metal plates and adhesive-backed printed labels applied directly to surface of item. Indirect part marking also includes labels

applied directly to existing identiﬁcation plates/label where space permits. Two other forms of indirect part marking are bag

and tag and virtual marking that can be used as a last resort.

5.1.1 Foreign Object Damage.

It is not recommended to use a data plate in locations where engine/air intakes have the potential to ingest the data

plate and/or any bolts or screws attaching the data plate to the item. Failure to comply could result in damage to,

or destruction of, equipment or loss of mission effectiveness.

Foreign Object Damage (FOD) is always a concern.

5.1.2 Environment. Consider the numerous factors in various environments when selecting material for a data plate.

Some of these may include temperature, dissimilar metals, and surrounding conditions (weather, sea water, etc.).

5.1.3 Dissimilar Metals. Corrosion is a concern when selecting metals for data plates. It is possible that when two

dissimilar metals are interfaced and subjected to certain environmental conditions for a period of time, galvanic corrosion

bonding or other adverse chemical reaction may occur. The Engineering Source Authority (ESA) must also consider the

material of the interfacing component when selecting data plate material. Refer to MIL-STD-889() when selecting data plate

material or considering other options to minimize corrosion.

5.1.4 Wear Resistance. In many environments, durability is often an issue when selecting the correct material for data

plates. At a minimum, the data plate should be able to withstand wear until the next maintenance activity. Ideally, the design

and placement of the data plate should last the entire lifecycle of item.

5.1.5 Location and Size of Data Plate. It is imperative that the design of a data plate does not adversely affect form, ﬁt,

or function of item. A location should be selected where no damage to data plate and/or item occurs.

5.1.6 Attaching Data Plate. Plates may be attached using adhesives, mechanical fasteners, or other means as speciﬁed in

technical data. The ESA must specify the method for attaching a data plate to item.

5.2 PLATE MANUFACTURING.

NOTE

The terms plate and label may be used interchangeably.

Onsite manufacturing of plates and labels can be an efficient way to ensure timeliness, quality, and control of design,

printing, application, and Unique Item Identiﬁer (UII) data integrity. Various materials and methods may be used when

manufacturing a plate or label for identifying an item. A number of factors must be taken into consideration during the

engineering analysis phase when selecting marking method, type of material, and label dimensions. Some of these factors

include dissimilar metals, wear resistance, location of data plate, and environment in which data plate resides.

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5-1

5.2.1 Aluminum Foil Labels. Aluminum foil labels are pliable, durable, versatile, and tamper proof. They are also

resistant to abrasion, chemicals, and solvents. Typically, they will withstand harsh environments including a wide range of

temperatures and Ultraviolet (UV) rays. The labels easily conform to curved surfaces and are lightweight. Aluminum foil

labels can be used in many different UID application scenarios if approved by the ESA. Aluminum foil labels can be

produced using a laser or photo-imaging process.

5.2.2 Aluminum ID Plates. Aluminum ID plates are rigid, durable, versatile, and tamper proof, and resistant to abrasion,

chemicals, and solvents. Typically, they will withstand harsh environments including a wide range of temperatures and UV

rays. Aluminum ID plates can be used in many different Unique Identiﬁcation (UID) application scenarios if approved by the

ESA. Aluminum ID plates can be engraved in one step using a laser or photo- imaging process.

5.2.3 Photosensitive Anodized Aluminum ID Plates (Metal Photo). Photosensitive anodized aluminum ID plates com-

bine durability in harsh environments with a high-quality, long-lasting appearance. Photosensitive ID plates will function for

several years, maintaining their original appearance under an array of conditions including extreme heat, humidity, long-term

exposure to weather, UV, salt spray, abrasion, industrial solvents, and chemicals. The durability for which photosensitivity is

known is the result of a manufacturing process in which a silver halide image is embedded within the sapphire-hard, anodic

layer of aluminum. The ID plate is resistant to chemicals, heat, abrasion, salt spray, and sunlight. Photosensitive ID plates

are considered to be the most durable aluminum ID plate and can be used in many different UID application scenarios if

approved by the ESA.

5.2.4 AlumaMark ID Plates. AlumaMark ID plates are made from a specially treated aluminum that yields rich black

graphics when marked with a laser, resulting in high contrast, easy to read marks. AlumaMark ID plates are durable,

versatile, and tamper proof, and resistant to abrasion, chemicals, and solvents. Typically, they are most suitable for indoor

use but can be used outside if a protective coating is used. AlumaMark ID plates can be used in many different UID

application scenarios if approved by the ESA.

5.2.5 Anodized Aluminum ID Plates. Anodized ID plates are very similar to aluminum ID plates but go through a

process that forms a hard layer of oxide on the surface of the material. Anodized ID plates are durable, versatile, and tamper

proof, and moderately resistant to abrasion, chemicals, and solvents. Typically, they will withstand mild to moderate envi-

ronments. Black anodized aluminum ID plates, when exposed to direct sunlight and high UV levels for extended periods,

have experienced fading and lose readability in relatively short periods of exposure. This should be taken into consideration

when plate application is to be on exterior surfaces subjected to these environmental conditions. Anodized ID plates can be

used for in many different UID application scenarios if approved by the ESA. Anodized ID plates come in many different

colors and can be engraved in one step using a laser or photo-imaging process.

5.2.6 DuraBlack Aluminum ID Plates. DuraBlack ID plates are composed of multilevel coatings on an aluminum base.

DuraBlack ID plates are durable, versatile, and tamper proof, and resistant to abrasion, chemicals, and solvents. Typically,

they will withstand harsh environments including a wide range of temperatures and UV rays. In side-by-side tests, Dura-

Black outperforms black anodized aluminum in most applications. DuraBlack ID plates can be used in many different UID

application scenarios if approved by the ESA. DuraBlack ID plates can be engraved in one step using a CO

laser providing

a high resolution mark.

5.2.7 Stainless Steel ID Plates. Stainless steel ID plates are durable, versatile, and tamper proof, and resistant to

abrasion, chemicals, and solvents. They will withstand the harshest environments including a wide range of temperatures and

UV rays. In environments where exposure to corrosive atmosphere or high heat is likely, stainless steel is, in most cases, the

material of choice. Stainless steel ID plates can be used in many different UID application scenarios if approved by the ESA.

It offers an unsurpassed clean, sharp, and detailed appearance that stands out in many applications. Stainless steel ID plates

can be chemically etched, dot peened, or laser etched. Stainless steel ID plates come in a variety of thicknesses and may be

attached using adhesive backing or mechanical fasteners.

5.2.8 Polyacrylic Labels. Polyacrylic labels consist of double-layered, highly cross-linked acrylic ﬁlm with modiﬁed

acrylic adhesive and a dimensionally stable release paper. They are durable, versatile, and tamper proof, and resistant to

abrasion, chemicals, and solvents. The labels are suitable for use in temperatures ranging from -58 to +392 °F. Polyacrylic

labels can be used in many different UID application scenarios if approved by the ESA and are the most common marking

media for IUID. The labels can be formed into custom sizes and shapes. Polyacrylic labels can be engraved using Nd:YAG

or CO

lasers. Polyacrylic labels have adhesive backing, which adheres to most plastic, metal, glass, painted, and ceramic

surfaces. A standard tamper evident design feature prevents the label from being removed in one piece once it is applied.

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5.2.9 Polyimide Labels. Polyimide is a polymeric plastic material, engineered for long-term performance at very high

temperatures in excess of 250 °C for prolonged periods of time. At extreme temperatures, the quality of mark and label

survivability are at risk. It is thermally very stable and is widely used in aerospace, electronics, and electrical industries

when high-temperature material is required. Because of its thermal stability, properly engineered polyimide ﬁlms do not

shrink or decompose at temperatures encountered in the circuit board industry. Polyimide labels can be used in many

different UID application scenarios if approved by the ESA. Polyimide labels may be printed using a thermal transfer or dot

matrix printer.

5.2.10 Thermal Transfer Printed Labels. Thermal transfer printed labels are easily identiﬁed by the crisp, often glossy,

printed surface. The clarity is achieved by using a thin ribbon roll that when heated by the print head melts onto the label to

form the image. When matched with suitable media, thermal transfer technology is resistant to heat and moisture, and the

image cannot be rubbed off, making the printed labels one of the most durable available. An additional beneﬁt of this

technology is the continuity of the printed image. Because the color and density of the printed image is determined by the

ribbon and resolution of the printer, thermal transfer printing produces consistent, reliable printing on every label. Thermal

transfer labels can be used in many different UID application scenarios if approved by the ESA. Thermal transfer labels

come in rolls in a variety of widths and thicknesses and have adhesive backing.

5.3 ALTERNATIVE MARKING METHODS.

5.3.1 Bag and Tag. Bag and tag is the process of creating and registering an IUID mark and placing it on the packaging

or container rather than on the item itself. There are some instances where bag and tag is the only possible solution: item is

too small for a veriﬁable IUID mark or environmental/operational conditions of item make other forms of marking unfea-

sible. Bag and tag must be approved by the ESA.

5.3.2 Virtual Marking. Virtual marking is the process of creating the UII for an item and registering the pedigree data

within the DoD IUID Registry. No IUID label is actually created and registry is annotated as such, but virtual marking

means that physical marking needs to occur at the next available opportunity. When item is physically marked, the registry

will be updated to reﬂect the status change.

Figure 5-1. Illustration of Thermal Printer

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CHAPTER 6

DIRECT PART MARKING

6.1 INTRODUCTION.

Direct Part Marking (DPM) is the application of a Unique Identiﬁcation (UID) data matrix mark directly onto the base

material of an item. DPM is often used when environmental conditions such as high temperatures, ﬂuids, airstream, etc.,

would prohibit the use of a label. DPM can be applied to the item and is often intrusive; therefore, safety precautions need

to be followed. It is the responsibility of the Engineering Source Authority (ESA) to conduct a thorough analysis to ensure

DPM is the viable alternative to mark the item.

6.1.1 There are some marking methods that are considered to be DPM, such as ink jet, silk screen, and stencil. Even

though they are not intrusive, they are less accepted and unproven IUID marking methods. These methods can be used if no

other form of DPM is viable. Consider the more common and proven methods ﬁrst.

6.2 DOT PEEN MARKING.

Most dot peening equipment is considered as either semi-automated or fully automated. Follow all safety guide-

lines outlined by the equipment manufacturer and item speciﬁc Technical Orders (TOs) or locally developed

procedures as applicable to prevent injury to personnel and damage to equipment and Department of Defense

(DoD) assets. Do not modify or alter safety equipment. Failure to do so could cause injury to personnel.

(Figure 6-1) Dot peen part marking is a process for marking an item using a stylus. The stylus is used on an X-Y coordinate

machine to indent the item, producing a data matrix and/or Human Readable Information (HRI). Dot peen marking technol-

ogy typically produces round indentations on a part’s surface with a pneumatically or electromechanically driven pin. The

dot’s shape, size, and spacing are critical to the readability of mark. The matrix created should be suitable to trap or reﬂect

light and large enough to be distinguishable from the item’s surface ﬁnish.

6.2.1 Special Considerations.

NOTE

Before selecting this method for use on DoD assets, take special consideration of the implications of the effects of

work hardening.

As a dot peen mark is created on an item, the stylus deforms the substrate causing an indentation on the item. During the

process, it causes a deformed region around the mark where the material has been cold worked (becomes more brittle).

Because of this, undesirable residual stresses may occur and the ductility of the part may be lost. See Figure 6-1.

6.2.2 The dot peen process should not be used under the following conditions:

a. Materials less than 0.02 inch (0.51 mm) thick.

b. Surfaces that are Electrical Discharge Machined (EDM).

c. Nonductile materials.

d. Assets where the mark may be potentially on an edge, around a hole, or on uneven surfaces.

e. Any highly stressed items.

f. Highly fatigued items.

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6-1

g. Marking preheated items that do not lend themselves to annealing.

6.2.2.1 When dot peening is not appropriate for use for a particular component, use an alternate method.

6.2.3 The basic steps in creating a dot peen UID data matrix are as follows:

a. For detailed step-by-step dot peen procedures, consult the OEM user manual, item speciﬁc TO, and locally developed

procedures, if applicable.

b. Set up item to correct angle and minimize any movement during marking process. To produce the data matrix per

MIL-STD-130, use appropriate ﬁxtures as necessary to prevent injury to personnel and/or damage to assets. Appropri-

ate ﬁxturing is necessary to properly secure item during dot peening process to prevent movement and comply with

MIL-STD-130.

c. Apply mark to component.

d. Verify and validate that mark is compliant with MIL-STD-130.

e. After item is marked, apply speciﬁed coating to prevent corrosion, if required.

6.3 ELECTROCHEMICAL ETCHING.

Electrochemical Etching (ECE) is a process used to etch away base material of an item by using an electrolyte and electrical

current. The basic theory behind electrochemical etching is that the base material reacts with the electrolyte and current. This

removes a very small amount of base material and redeposits it, causing discoloration. See Figure 6-2.

6.3.1 Equipment. ECE marking equipment can consist of a power unit, electrode (wand), mask/stencil, ground cable,

grounding plate, and electrolytes. Additional tooling and ﬁxturing may be required to properly hold the component in

position and to potentially automate the process as needed.

6.3.2 Methodology.

• Electrochemical etching uses electrical current. Follow all safety guidelines outlined in manufacturer’s instruc-

tion manual, item speciﬁc TOs, or locally developed procedures, if applicable. Ensure component and equip-

ment are properly grounded prior to electrochemical etching any item. Wear proper safety equipment when

using electrochemical etching equipment.

• Electrolytes used in the electrochemical etching process may be hazardous. Follow all Safety Data Sheet (SDS)

safety guidelines when using electrolytes. Failure to comply could result in injury to, or death of, personnel or

long term health hazards.

Wipe off and clean all excess electrolytes from items as they may cause corrosion. Failure to comply could result

in damage to, or destruction of, equipment or loss of mission effectiveness.

This methodology for part marking using the electrochemical etching process is a general guideline. When a conﬂict occurs

between this TO and the instructions for a speciﬁc item, the speciﬁc item’s information takes precedence. When electro-

chemical etching is allowed on a component, the type of electrolyte, surface preparation method, voltage, number of cycles,

dwell time, and neutralizer must be speciﬁed.

6.3.3 The basic steps for creating an ECE UID data matrix are as follows:

a. Set up equipment per the instructions speciﬁed in the owner’s manual.

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6-2

b. Create a mask/stencil of the information (data matrix, any HRI, if applicable) to be applied to the part.

c. Apply appropriate electrolyte to sponge or cloth.

d. Apply mask/stencil to part.

e. Activate electrical current and monitor the time and cycles of current.

f. Turn off electrical current.

g. Wipe off and neutralize remaining electrolyte on part.

h. Verify and validate that mark is compliant with MIL-STD-130.

i. After item is marked, apply speciﬁed coating to prevent corrosion, if required.

6.3.4 AC vs. DC Current. There are two separate currents that may be used when electrochemical etching items. Alter-

nating Current (AC) is generally used to extract material from marking surface and redeposit it back on the item in the form

of a metallic oxide. Electrolytes used in this process cause the IUID mark to become discolored or darkened. AC and Direct

Current (DC) are often used together to form a deep-etched mark. See Figure 6-3.

6.3.5 Advantages. ECE is a viable option for components under high stress because the process does not affect the

surrounding grain structure like other DPM processes. The depth of the mark can easily be controlled due to electrolyte used,

dwell time, and voltage applied.

6.3.6 Disadvantages. Electrochemical etching cannot be used in the following scenarios:

a. Nonconductive materials

b. Any coated components:

• Anodized parts

• Painted surfaces

• Tagnite, etc

c. Electrochemical etching (nondeep etch) typically affects shallower areas of the part. This means that the mark is not

very good for high wear areas.

d. Like most DPM, ECE can be difficult to verify. Refer to veriﬁcation work package in this TO for ways to assist in the

veriﬁcation of a direct part mark.

6.4 LASER MARKING.

Use extreme caution when being exposed to lasers. Lasers emit and reﬂect intense energy beams, which could

cause severe burns or eye damage. Ensure proper protective barriers and/or safety equipment are in place. Do not

alter or disable protective barriers or equipment. Failure to comply could result in injury to, or death of, personnel

or long term health hazards.

Laser DPM uses ampliﬁed high intensity light to scribe the matrix on item and is generally very precise and accurate. This

method of IUID marking is more durable than many other DPM methods. The depth of the IUID mark can be determined by

the speed and intensity of the laser.

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6-3

6.4.1 Laser Types. There are numerous laser types that can be used when marking items. Carefully select the laser type

that would work best for the application.

6.4.1.1 Femto Lasers. Femto lasers are high-precision lasers that use a high power, ampliﬁed light beam and marks at

very high speeds. Thermal effects on the substrate are minimal due to an intense beam that removes material quickly, thus

reducing the Heat Affected Zone (HAZ) on the item.

6.4.1.2 YAG.

Most Yttrium Aluminum Garnet (YAG) lasers are considered to be a class I (reference LIA Z136.1) type laser;

therefore, appropriate protective safety gear must be worn or proper protective equipment interlocks must be in

place to protect personnel. Failure to comply could result in injury to, or death of, personnel or long term health

hazards.

YAG lasers are one of the most common types of lasers used. They use a ﬂashtube or laser diode to amplify the light and can

be operated in pulsing or continuous mode. The YAG laser is ideally suited to be absorbed in most metals; however, it has

a small wavelength which inhibits its ability to be absorbed by many other materials such as wood, acrylics, plastics, fabrics,

etc.

6.4.1.3 CO

Lasers. CO

lasers operate at a much higher wavelength than YAG lasers. This makes them ideal for

marking organic materials such as wood, acrylics, rubber, etc. However, when using CO

on metal, a bonding agent for

contrast is needed to make veriﬁable and readable marks due to the inability of laser to penetrate the substrate. Generally,

lasers are not the best option for DPM.

6.4.2 Laser Schedules. When called out by technical data, the laser schedule will indicate power settings, location, depth

of mark, and speed required to generate a safe and veriﬁable mark. It is often recommended that a laser setting schedule be

tested on a coupon of the same material. This testing conﬁrms a safe depth of the HAZ to validate part integrity is not

compromised.

6.4.3 Considerations. When laser marking parts, there are a few factors that need to be considered to ensure a good,

veriﬁable mark is going to be produced.

6.4.3.1 The ﬁrst consideration is the type of material being marked followed by its thickness. This will affect the laser

selected and power setting and speed necessary to produce a robust mark.

6.4.3.2 HAZ is often a factor. Refer to Paragraph 6.4.4 for heat considerations.

6.4.3.3 Stress on the component is also a big consideration when considering whether or not to use laser marking on a

part. Consider the amount of HAZ on a part and how much is permissible given the amount of stress on the component.

6.4.4 Heat Affected Zone. Figure 6-4) HAZ is deﬁned as the region around the marking area that has had its microstruc-

ture altered due to the intense heat. In laser marking, heat affected zones can be detrimental when the part is highly stressed.

6.4.4.1 Occasionally, the HAZ may be minimized by stress relieving the part or by carefully grinding away the affected

zone. The cognizant engineering authority should decide whether the item is acceptable for laser welding or stress relieving

to ensure that no detrimental effects occur to the item.

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Figure 6-1. Dot Peening

Figure 6-2. Electrochemical Etching Equipment

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Figure 6-3. Illustrations of AC Current on a Ferrous Parent Material Type

Figure 6-4. Diagram of Heat Affected Zone

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CHAPTER 7

VERIFICATION, VALIDATION, AND INSPECTION

7.1 VERIFICATION AND VALIDATION.

Veriﬁcation of data matrix quality and validation of Machine-Readable Information (MRI) encoded in the Unique Item

Identiﬁer (UII) data matrix are requirements for the production of MIL-STD-130 compliant UII labels. Imaging equipment

with correctly conﬁgured lighting and compliant ISO/IEC 15416 and AIM DPM-1-2006 software are required to accomplish

this function. Validation and veriﬁcation work in conjunction to produce a letter grade for the data matrix.

7.1.1 For Direct Part Marking (DPM), a letter grade of C or better must be achieved. For indirect part marks, a letter grade

of B or better must be achieved.

7.1.2 Data matrix symbol quality can be determined using any of the following standards: ISO/IEC 15415, AIM DPM-1-

2006, or SAE AS9132.

7.1.3 Veriﬁcation/Validation Batch Sampling. When large quantities of marks are needed, verifying every mark can be

very time consuming. MIL-STD-130 allows for the adoption of a lot acceptance sampling plan as a method to test the

integrity of a batch of barcodes without having to verify every barcode. Lot acceptance sampling is an inspection procedure

where a random sample is taken from a lot. Upon the results of the samples, the lot is either rejected or accepted.

7.2 NEWLY MANUFACTURED UID LABEL AND DATA PLATE INSPECTION.

The following inspection activities will apply to indirect part marking Unique Identiﬁcation (UID) labels. Magnifying loops

and other optical magniﬁcation enhancement tools may be useful when performing the following inspections.

7.2.1 Inspection of newly manufactured UID labels prior to application:

a. Ensure all Human Readable Information (HRI) is legible, spelled correctly, and applicable to the item on which label

will be applied.

b. Check for debris, corrosion, cracks, tears, holes, or scratches that may interfere with label application on item.

c. Reference item speciﬁc applicable TO to conﬁrm location of the UID label on item. Ensure surface preparation and

label application procedures are followed prior to application. See Chapter 4 on surface preparation.

d. Conﬁgure lighting to support veriﬁcation/validation of data matrix.

e. Scan the UID data matrix to conﬁrm encoded data is applicable to item being marked.

7.3 NEWLY MARKED DPM UID INSPECTIONS REQUIREMENTS.

The following inspection activities will apply to DPM. Magnifying loops and other optical magniﬁcation enhancement tools

may be useful when performing the following inspection activities.

7.3.1 Inspect DPM Marked Assets. Ensure all HRI is legible, spelled correctly, and applicable to item on which DPM is

applied.

a. Check DPM marked area for debris, corrosion, cracks, tears, holes, or scratches that may interfere with or impede the

readability of the HRI data.

b. Reference item speciﬁc applicable TO to conﬁrm location of UID on item prior to application. Ensure surface prepa-

ration application procedures are followed. See Chapter 4 on surface preparation.

c. Conﬁgure lighting to support veriﬁcation/validation of data matrix.

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d. Scan DPM UII to conﬁrm encoded data is applicable to item being marked.

7.3.1.1 Incorrect or Nonconforming DPM Marked Items. If DPM items do not pass inspection process, refer to appli-

cable TO and MIL-STD-130 for instructions on how to obliterate a bad mark, ﬁnd an alternate DPM location, and remark

the item.

7.4 INSPECTION OF EXISTING UID LABELS ON ITEMS RETURNING FOR MAINTENANCE.

The following inspection activities will apply to existing indirect UID labels. Magnifying loops and other optical magniﬁ-

cation enhancement tools may be useful when performing the following inspection activities.

a. Visually inspect incoming item for existing UID labels and data plates. Incoming items should be inspected for

existing UID labels and data plates prior to producing new labels for item assets that may already have them. When

trying to locate small or hard to ﬁnd UID labels or data plates, it may be helpful to reference applicable technical data

to conﬁrm the correct location of UID label or data plate on the item.

b. If UID label exists:

(1) Remove any accumulated debris, dust, and dirt from UID label. Reference applicable technical data for proper

cleaning procedures as required.

(2) Check UID label for corrosion, cracks, holes, peeling, tears, scratches, or any other damage that may interfere

with or impede readability of the UII.

(3) Scan UII data matrix symbol to conﬁrm encoded data is applicable to item. MIL-STD- 130 requires a minimum

of 60% readability, also referred to as a minimum of 40% of unused error correction. Remark all noncompliant

labels per applicable technical data using construct 25S. It is recommended that remarking occur if lifecycle wear

of the data matrix is nearing minimum readability.

c. If UID label or data plate passes inspection:

(1) If label or data plate is not damaged and HRI/MRI data is readable and has been conﬁrmed to be correct, do not

make replacement label unless repair process will destroy existing UID label.

(2) If existing label must be removed, ensure MRI data has been captured and is used when replacement label is

produced.

d. If UID label does not exist and item requires Item Unique Identiﬁcation (IUID), check legacy systems (if item legacy

data is known) to determine if item was previously marked. Legacy systems may include Depot Maintenance Repair

Overhaul System (IMPRESA), Defense Repair Information Logistics System (G200) (DRILS), Lean Depot Manage-

ment System (LDMS), Central Engine Management System (CEMS), and Centralized Access for Data Exchange

(CAFDEx), or systems not identiﬁed here, to determine if an item was previously marked. This will aid in not

assigning a new UII to a previously marked item.

7.5 INSPECTION OF EXISTING DPM DATA MATRIX AND UII ON ITEMS RETURNING FOR MAINTE-

NANCE.

The following inspection activities will apply to existing DPM symbol. Magnifying loops and other optical magniﬁcation

enhancement tools may be useful when performing the following inspection activities. For difficult to locate DPM UIIs, it

may be useful to reference applicable technical data to conﬁrm the correct location.

7.5.1 Visually Inspect Incoming Item for Existing IUID Data Matrix.

a. Ensure all HRI is legible, spelled correctly, and applicable to item on which the DPM is applied.

b. Check DPM marked area for debris, corrosion, cracks, tears, holes, or scratches that may interfere with or impede

readability of HRI data.

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c. Reference item speciﬁc applicable TO to conﬁrm location of UID on item prior to application. Ensure surface prepa-

ration application procedures are followed. See Chapter 4 on surface preparation.

d. Scan DPM UII to conﬁrm readability. It is recommended to capture the UII for potential remarking items if UII will be

destroyed during maintenance process.

e. If DPM marked item does not pass inspection process, reference item speciﬁc TO for detailed instructions on remark-

ing.

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