NSN & Federal Supply Class Lookup
Search 650+ Federal Supply Classes and 70+ Federal Supply Groups used in National Stock Numbers, DIBBS, and DLA procurement.
WEAPONS
NUCLEAR ORDNANCE
FIRE CONTROL EQPT.
AMMUNITION AND EXPLOSIVES
GUIDED MISSLES
AEROSPACE CRAFT AND STRUCTURAL COMPONENTS
AEROSPACE CRAFT COMPONENTS AND ACCESSORIES
AEROSPACE CRAFT LAUNCHING, LANDING, GROUND HANDLING AND SERVICING EQUIPMENT
SHIPS, SMALL CRAFT, PONTOON, DOCKS
SHIP AND MARINE EQUIPMENT
RAILWAY EQUIPMENT
MOTOR VEHICLES, CYCLES, TRAILERS
TRACTORS
VEHICULAR EQUIPMENT COMPONENTS
TIRES AND TUBES
ENGINES AND TURBINES AND COMPONENT
ENGINE ACCESSORIES
MECHANICAL POWER TRANSMISSION EQPT
BEARINGS
WOODWORKING MACHINERY AND EQPT
METALWORKING MACHINERY
SERVICE AND TRADE EQPT
SPECIAL INDUSTRY MACHINERY
AGRICULTURAL MACHINERY AND EQPT
CONSTRUCT/MINE/EXCAVATE/HIGHWY EQPT
MATERIALS HANDLING EQPT
ROPE, CABLE, CHAIN, FITTINGS
REFRIG, AIR CONDIT/CIRCULAT EQPT
FIRE/RESCUE/SAFETY; ENVIRO PROTECT
PUMPS AND COMPRESSORS
Understanding National Stock Numbers
NSN structure and how Federal Supply Classes connect to DLA procurement
FSG Groups
Federal Supply Groups are 2-digit codes that organize supplies into broad categories like Weapons (10), Vehicles (23), or Electrical Equipment (61).
FSC Classes
Federal Supply Classes are 4-digit codes providing granular classification. FSC 1005 = Guns through 30mm, FSC 5961 = Semiconductor Devices.
NSN Structure
A 13-digit National Stock Number: first 4 digits are the FSC class, next 2 are the country code (00 = USA), last 7 are the item serial number.
DIBBS & DLA
NSN codes are used throughout DIBBS (DLA Internet Bid Board System) for military parts procurement. Search by FSC class to find procurement categories.
What is a National Stock Number (NSN)?
A National Stock Number (NSN) is a 13-digit numeric code used by NATO countries to identify every item of supply in their logistics systems. NSNs are used by the Defense Logistics Agency (DLA) to catalog, procure, and distribute military and government supplies.
The NSN format is XXXX-XX-XXX-XXXX where the first 4 digits are the Federal Supply Class (FSC), which maps directly to numeric PSC product codes. The FSC tells you what category of supply the item belongs to.
Government contractors bidding on DIBBS solicitations use FSC codes to identify their areas of expertise. Understanding the FSC hierarchy helps you find relevant procurement opportunities and register for the right categories on SAM.gov.
NSN Structure Breakdown
Example: NSN 5961-00-123-4567 = Semiconductor Devices (FSC 5961), US origin
Frequently Asked Questions
What is the difference between FSC, FSG, and NSN?
FSG (Federal Supply Group) is a 2-digit code for broad categories. FSC (Federal Supply Class) is a 4-digit code for specific item types within a group. NSN (National Stock Number) is the full 13-digit identifier for a specific cataloged item, with the FSC as its first 4 digits.
How do FSC codes relate to PSC codes?
Federal Supply Classes (FSC) are identical to numeric PSC product codes. For example, FSC 5961 and PSC 5961 both mean “Semiconductor Devices.” PSC codes also include alphabetic service codes (A-Z), which have no FSC equivalent. Use our PSC lookup tool for the complete product and service code database.
How are NSN codes used in DIBBS?
DIBBS (DLA Internet Bid Board System) uses NSN codes to identify items in solicitations. Contractors can search DIBBS by NSN to find procurement opportunities for specific parts. The FSC class helps narrow searches to relevant supply categories.
Where does this FSC/FSG data come from?
Federal Supply Classification data comes from the GSA Product and Service Code Manual, published at acquisition.gov. The FSC/FSG hierarchy is maintained by the Defense Logistics Agency (DLA) as part of the Federal Cataloging System.
