National Stock Number(NSN)
A 13-digit numeric code used by the federal government to identify and catalog supplies and materials in a standardized way.
Overview
A National Stock Number (NSN) is a 13-digit identifier assigned to each item in the federal supply system. It enables consistent identification of parts, supplies, and equipment across the military and civilian agencies. The NSN is used for cataloging, procurement, inventory management, and logistics.
Why It Matters in GovCon
Many government solicitations — especially for supplies, spare parts, and MRO — reference NSNs. Contractors must be able to match their products to the correct NSN or obtain an NSN for new items. NSN assignment is managed through the Federal Logistics Information System (FLIS).
Key Details
- Structure: 4-digit Federal Supply Class (FSC) + 9-digit National Item Identification Number (NIIN).
- Assignment: Defense Logistics Agency (DLA) manages NSN assignments.
- Cataloging: Items with NSNs appear in federal catalog systems used for procurement.
- Replacement: NSNs can be superseded when items are modified or replaced.
Related Terms
- Federal Supply Class (FSC)
- Defense Logistics Agency (DLA)
- National Item Identification Number (NIIN)
- Maintenance, Repair, and Operations (MRO)
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