identifier

FSC — Federal Supply Class

Also known as: Federal Supply Class

First four digits of an NSN — the federal supply category.

The Federal Supply Class (FSC) is the first four digits of an NSN. It groups items by family (e.g. 5305 Screws, 5306 Bolts, 5310 Nuts and Washers, 5320 Rivets, 5330 Packing and Gasket Materials, 5331 O-Rings). PartsPerk uses FSC for cross-linking between NSN doorways and category hubs.

Canonical URL: https://partsperk.com/glossary/fsc · Glossary entries are buyer-language definitions; not regulatory or engineering advice.