# NSN Parts — Full Reference

> NSN-PARTS.COM supplies aviation hardware, military NSN parts, connectors, and electronic components in stock. Get fast quotes and dependable sourcing support.

NSN-PARTS.COM (operated by 773 Group) supplies National Stock Number (NSN) parts: aviation hardware, military-spec components, electrical connectors, and electronic components. The catalog holds 8,000,000+ individually listed parts organized by Federal Supply Classification (FSC) code.

## What is an NSN
A National Stock Number is a 13-digit identifier (e.g. 5310-00-123-4567) assigned by the U.S. Defense Logistics Agency (DLA) under the Federal Logistics Information System (FLIS). The first 4 digits are the FSC (Federal Supply Class), the next 2 the NCB country code, and the final 7 a sequential serial number; the last 9 digits together form the NIIN (National Item Identification Number). Product pages on this store are addressable by NSN, manufacturer part number, and CAGE code.

## Finding parts
- Search: https://www.nsn-parts.com/en-us/search?q= — accepts NSN (with or without dashes), part number, CAGE code, or keyword
- FSC Directory (browse all Federal Supply Classes): https://www.nsn-parts.com/en-us/collections/fsc-directory
- FSC range collections follow the URL pattern: https://www.nsn-parts.com/en-us/collections/fsc-code-XXXX-YYYY (e.g. fsc-code-6505-6550, fsc-code-7010-7050)
- Top Searched Components: https://www.nsn-parts.com/en-us/collections/frontpage
- Product URLs follow: https://www.nsn-parts.com/en-us/products/{handle}

## Company pages
- About Us: https://www.nsn-parts.com/en-us/pages/about-us
- Industries Served: https://www.nsn-parts.com/en-us/pages/industries
- Value-Added Services: https://www.nsn-parts.com/en-us/pages/value-added-services
- Excess Inventory Solutions: https://www.nsn-parts.com/en-us/pages/excess-inventory-solutions
- Contact / Request a Quote: https://www.nsn-parts.com/en-us/pages/contact
- Data Sharing Opt-Out: https://www.nsn-parts.com/en-us/pages/data-sharing-opt-out

## Ordering and logistics
- Ships to 29 countries: US, CA, GB, DE, FR, IT, ES, NL, BE, AT, CH, IE, PT, DK, SE, NO, FI, PL, CZ, AU, NZ, JP, KR, SG, HK, MY, IL, AE, BR
- Quotes and sourcing support via the contact page; excess-inventory purchasing available
- Checkout requires human approval for payment; agents must use the UCP/MCP endpoints (see below)

## Knowledge base
- Full article guide with summaries: https://www.nsn-parts.com/en-us/blogs-llms.txt
- How to Read an NSN: https://www.nsn-parts.com/en-us/blogs/news/how-to-read-an-nsn-national-stock-number-explained
- Federal Supply Classification (FSC) Explained: https://www.nsn-parts.com/en-us/blogs/news/federal-supply-classification-fsc-explained
- CAGE Codes Explained: https://www.nsn-parts.com/en-us/blogs/news/cage-codes-explained-what-they-are-how-to-find
- How to Get a CAGE Code (SAM.gov guide): https://www.nsn-parts.com/en-us/blogs/news/how-to-get-a-cage-code-sam-gov-registration-guide
- Defense Contracting Basics — FLIS: https://www.nsn-parts.com/en-us/blogs/news/defense-contracting-flis-how-military-parts-are-identified
- How to Buy NSN Parts Through the DLA: https://www.nsn-parts.com/en-us/blogs/news/how-to-buy-nsn-parts-through-dla-defense-procurement-guide
- Full archive: https://www.nsn-parts.com/en-us/blogs/news

## Catalog guides for LLMs
- FSC Directory guide (all Federal Supply Class collections by group): https://www.nsn-parts.com/en-us/fscs-llms.txt
- CAGE Code directory (top 1,000 CAGEs, company names, example parts): https://www.nsn-parts.com/en-us/cage-codes-llms.txt
- Top catalog items part 1: https://www.nsn-parts.com/en-us/top-products-1-llms.txt
- Top catalog items part 2: https://www.nsn-parts.com/en-us/top-products-2-llms.txt
- Knowledge base guide (all articles + summaries): https://www.nsn-parts.com/en-us/blogs-llms.txt

## For AI agents
- Canonical agent instructions: https://www.nsn-parts.com/agents.md
- UCP discovery: https://www.nsn-parts.com/.well-known/ucp
- UCP/MCP endpoint (catalog, cart, checkout): https://www.nsn-parts.com/api/ucp/mcp
- Payment always requires explicit, contemporaneous buyer approval — do not automate checkout
- Sitemap index (8M+ product URLs, 3,200+ child sitemaps): https://www.nsn-parts.com/en-us/sitemap-index.xml
- robots.txt: https://www.nsn-parts.com/robots.txt