ORDER OF USE (OOU): A THREE POSITION ALPHA CODE DENOTING THE INTERCHANGEABILITY AND SUBSTITUTABILITY (I&S) RELATIONSHIP OF A NATIONAL STOCK NUMBER WITHIN A SERVICE/AGENCY I&S FAMILY. THE FIRST TWO POSITIONS INDICATE THE I&S ORDER OF USE SUBGROUP CODE AND THE LAST POSITION INDICATES THE ORDER OF USE SEQUENCE CODE WITHIN SUBGROUPS. CODE A INDICATES THE MOST PREFERRED ITEM AND WILL BE RANKED ALPHABETICALLY BASED ON PREFERENCE. IN ACCORDANCE WITH DA PAM 708-2, PARAGRAPH 2-17.
This is a free-text or numeric FLIS field — it has no enumerated code values. The definition above is its official cataloging meaning.
About ORDER_OF_USE
What is ORDER_OF_USE in FLIS / NSN cataloging?
ORDER_OF_USE (Order of Use) oRDER OF USE (OOU): A THREE POSITION ALPHA CODE DENOTING THE INTERCHANGEABILITY AND SUBSTITUTABILITY (I&S) RELATIONSHIP OF A NATIONAL STOCK NUMBER WITHIN A SERVICE/AGENCY I&S FAMILY. THE FIRST TWO POSITIONS INDICATE THE I&S ORDER OF USE SUBGROUP CODE AND THE LAST POSITION INDICATES THE ORDER OF USE SEQUENCE CODE WITHIN SUBGROUPS. CODE A INDICATES THE MOST PREFERRED ITEM AND WILL BE RANKED ALPHABETICALLY BASED ON PREFERENCE. IN ACCORDANCE WITH DA PAM 708-2, PARAGRAPH 2-17.
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.
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