NATIONAL ITEM IDENTIFICATION NUMBER (NIIN): A NINE POSITION NUMERIC NUMBER ASSIGNED TO EACH APPROVED ITEM IDENTIFICATION. THE FIRST TWO POSITIONS ARE THE NATIONAL CODIFICATION BUREAU (NCB) CODE, FOLLOWED BY A SEVEN POSITION NON-SIGNIFICANT NUMBER.
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This is a free-text or numeric FLIS field — it has no enumerated code values. The definition above is its official cataloging meaning.
About NIIN
What does NIIN stand for?
NIIN stands for National Item Identification Number. It is a U.S. Defense Logistics Agency FLIS / NSN cataloging field, governed by DoD 4100.39-M.
What is NIIN in FLIS / NSN cataloging?
NATIONAL ITEM IDENTIFICATION NUMBER (NIIN): A NINE POSITION NUMERIC NUMBER ASSIGNED TO EACH APPROVED ITEM IDENTIFICATION. THE FIRST TWO POSITIONS ARE THE NATIONAL CODIFICATION BUREAU (NCB) CODE, FOLLOWED BY A SEVEN POSITION NON-SIGNIFICANT NUMBER.
Last updated 2026-06-05. 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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