NIIN — National Item Identification Number

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.

Also written as: CANCELLED_NIINREPLACEMENT_NIIN

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 is NIIN in FLIS / NSN cataloging?

NIIN (National Item Identification Number) 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 2026-05-26. 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.