Looking for NSN parts you can trust? Aviation Store Online connects you to a searchable database of National Stock Number components for military, aerospace, and defense procurement. Every part we distribute is backed by rigorous quality checks, and with supply-chain locations across the US, Canada, and the UK, we keep lead times short no matter where your order ships from.
What Is an NSN & NIIN?
A National Stock Number (NSN) is a 13-digit code used to identify and manage supply items across NATO and allied defense systems. It's made up of a 4-digit Federal Supply Classification (FSC), which groups the part by category, followed by a 9-digit National Item Identification Number (NIIN) that makes each part unique. The first two digits of the NIIN identify the country that assigned it, and the remaining seven digits are sequential. Knowing this structure makes it easier to search, cross-reference, and verify the exact part you need.
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Certifications & Quality Assurance
Aviation Store Online operates under AS9120B, ISO 9001:2015, and FAA AC 00-56B accreditation, along with ANSI/ESD S20.20, AS6081 counterfeit-parts mitigation, and ASA membership so every part you source meets recognized aerospace and defense quality standards.