APPLICABILITY KEY: A THREE POSITION ALPHANUMERIC CODE THAT INDICATES WHETHER A REQUIREMENT IN A FEDERAL ITEM IDENTIFICATION GUIDE (FIIG) NEEDS TO BE SATISFIED FOR THE ITEM BEING IDENTIFIED.
This is a free-text or numeric FLIS field — it has no enumerated code values. The definition above is its official cataloging meaning.
About APP_KEY
What is APP_KEY in FLIS / NSN cataloging?
APP_KEY (Applicability Key) aPPLICABILITY KEY: A THREE POSITION ALPHANUMERIC CODE THAT INDICATES WHETHER A REQUIREMENT IN A FEDERAL ITEM IDENTIFICATION GUIDE (FIIG) NEEDS TO BE SATISFIED FOR THE ITEM BEING IDENTIFIED.
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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