Federal Contracting Acronym
NSN
National Stock Number
Plain-English definition
A National Stock Number uniquely identifies items of supply in the federal cataloging system used by DLA and military services. In federal practice, National Stock Number connects to how contracting officers, program offices, and industry teams interpret requirements, document decisions, and execute awards. Authoritative context is typically found in DLA materials and agency supplements where applicable. Contractors should trace how NSN appears in the specific solicitation or contract rather than assuming uniform usage across agencies.
Why it matters
Understanding National Stock Number (NSN) reduces misalignment during proposal preparation, contract performance, and compliance reviews tied to systems & registrations obligations.
Where you will see it
SAM.gov notices, contract clauses and attachments, DoD forms and supply systems when applicable, and internal capture or program management documentation.
Example in context
During a bid review, the capture lead notes NSN in the solicitation, assigns a subject-matter owner to confirm requirements, and records the decision in the compliance matrix.