What is an FSC Code?

FSC (Federal Supply Class) is a 4-digit code used to group similar items of supply in the NATO and U.S. Government cataloging system.

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FSC inside the NSN

Every NSN starts with an FSC. For example:

• 5305-01-234-5678 → FSC 5305 (Screws)
• 5330-00-987-6543 → FSC 5330 (Packing and Gaskets)
• 5340-01-111-2222 → FSC 5340 (Hardware, Commercial)

Why FSC matters for suppliers

• Focus on FSCs that match your product range or capabilities
• Analyze demand and RFQs by class instead of single NSNs
• Build internal target lists (e.g. 5305, 5330, 5340, 3120)