OPTIONAL PROCEDURE INDICATOR CODE: A ONE POSITION ALPHA CODE THAT INDICATES THE ALLOWABLE DEVIATIONS FROM THE PRESCRIBED REQUIREMENTS. IN ACCORDANCE WITH DOD 4100.39-M, VOLUME 10, TABLE 182 AND MIL-STD-2073-1E, APPENDIX J, TABLE J.VIIIA.
Governing regulation: /N HTTPS://QUICKSEARCH.DLA.MIL/QSSEARCH.ASPX
Code values (5)
| Code | Meaning | Definition |
|---|---|---|
| A | Procedural Specification | PACKAGING IS IN ACCORDANCE WITH A PROCEDURAL SPECIFICATION OR A SPECIAL PACKAGING INSTRUCTION (SPI). THE APPROPRIATE SPECIFICATION NUMBER WILL BE SHOWN IN THE CLEAR IN THE SUPPLEMENTAL DATA AREA. |
| E | Certain Options Can Be Exercised | CERTAIN OPTIONS CAN BE EXERCISED AS TO SPECIFIC METHOD OF PRESERVATION OR DOD APPROVED PACKAGING MATERIALS, BUT ONLY AS INDICATED IN SUPPLEMENTAL DATA. HOWEVER, BASIC PRESERVATION METHOD SHALL BE RETAINED AND UNIT PACKAGE DIMENSIONS SHALL NOT BE INCREASED BY MORE THAN ONE INCH. EQUAL OR BETTER PROTECTION SHALL BE GIVEN THE ITEM AND THERE SHALL BE NO INCREASE IN THE PACKAGE COST. |
| M | Packaging Data Is Mandatory | ALL PACKAGING DATA IS MANDATORY FOR COMPLIANCE AND NO SUBSTITUTIONS ARE PERMITTED. FAST PACKS SHOULD BE INCLUDED IN THIS CATEGORY. |
| O | Options Can Be Exercised | OPTIONS CAN BE EXERCISED AS TO SPECIFIC METHOD OF PRESERVATION OR DOD APPROVED PACKAGING MATERIALS TO BE USED. HOWEVER, BASIC PRESERVATION METHOD SHALL BE RETAINED, SUPPLEMENTAL DATA SHALL BE COMPLIED WITH, AND UNIT PACKAGE DIMENSIONS SHALL NOT BE INCREASED BY MORE THAN ONE INCH. EQUAL OR BETTER PROTECTION SHALL BE GIVEN THE ITEM AND THERE SHALL BE NO INCREASE IN THE PACKAGE COST. |
| P | For Special Packaging Instruction Items | FOR SPECIAL PACKAGING INSTRUCTION (SPI) ITEMS, POLYURETHANE FOAM-IN-PLACE (F-I-P) IS PERMITTED AS SPECIFIED ON THE SPI ONLY WHEN THE SPI PACK IS NOT AVAILABLE. |
About OPI
What is OPI in FLIS / NSN cataloging?
OPI (Optional Procedure Indicator) oPTIONAL PROCEDURE INDICATOR CODE: A ONE POSITION ALPHA CODE THAT INDICATES THE ALLOWABLE DEVIATIONS FROM THE PRESCRIBED REQUIREMENTS. IN ACCORDANCE WITH DOD 4100.39-M, VOLUME 10, TABLE 182 AND MIL-STD-2073-1E, APPENDIX J, TABLE J.VIIIA.
What does OPI code A mean?
OPI code A means "Procedural Specification". PACKAGING IS IN ACCORDANCE WITH A PROCEDURAL SPECIFICATION OR A SPECIAL PACKAGING INSTRUCTION (SPI). THE APPROPRIATE SPECIFICATION NUMBER WILL BE SHOWN IN THE CLEAR IN THE SUPPLEMENTAL DATA AREA.
How many OPI codes are there?
The U.S. Defense Logistics Agency defines 5 OPI (Optional Procedure Indicator) code values in the FLIS published code dictionary. Each is listed on this page with its official meaning.
Last updated 2026-05-26. Published by DAITK™ against the U.S. Defense Logistics Agency (DLA) FLIS code dictionary, governed by DoD 4100.39-M (Federal Logistics Information System Procedures Manual).
The authoritative FLIS code dictionary published by DAITK™ — every cataloging field and value code, defined verbatim against the U.S. Defense Logistics Agency (DLA) FLIS standard, governed by DoD 4100.39-M. Authorized reference data, reproduced with attribution, not scraped.
Need NSN-cataloged items, or help decoding a record?
Dibblee Industries (NCAGE L0TZ1) supplies NATO-codified items and operates DAITK™, which queries this authorized FLIS reference data to decode and source procurement records.
Ask DAITK FLIS Code Dictionary