Every part in the NSN system falls under a Federal Supply Group (FSG) and a more specific Federal Supply Codes (FSC) — a standardized system used for aircraft parts classification across the aerospace, aviation, and defense industries. Rather than relying on inconsistent or vague part descriptions, procurement teams, engineers, and buyers can reference a single, government-standardized code to identify exactly what a component is, how it functions, and where it fits within a larger system. Aero OEM Parts structures its entire inventory around this classification system, offering a simple and reliable FSC parts lookup that takes you from a broad supply group down to the exact part you need — without wasting time browsing unrelated listings. This is especially valuable when working against tight timelines, such as during an aircraft on ground event, where identifying the correct component quickly can make all the difference.
Browse the FSG categories listed below to explore each group's related FSC listings, or use our search tool to look up NSN parts by category if you already know the classification you're working with. Each FSC category links directly to its available inventory, giving you immediate visibility into part numbers, descriptions, and stock. Once you've located the right FSC category and identified the component you need, simply review the listing details and submit an RFQ to receive pricing and availability, typically within 15 minutes of your request.
Why FSC Classification Matters When Sourcing Parts
Federal Supply Codes exist to remove ambiguity from procurement. Instead of relying on inconsistent or manufacturer-specific part descriptions, buyers and suppliers can reference one standardized code that identifies exactly what a component is and how it's used across different platforms and applications. This becomes especially critical during aircraft on ground (AOG) situations, where every hour of delay carries real operational and financial cost, or when tracking down obsolete, hard-to-find parts that may no longer be listed under a single manufacturer name.
At Aero OEM Parts, every part listed under a given FSC comes with traceable documentation and CAGE Code verified sourcing, so procurement teams never have to compromise on quality or compliance to move quickly. Our classification system is built to give you a reliable, repeatable way to search NSN parts by category, whether you're sourcing a single component or managing ongoing supply chain needs across multiple aircraft platforms. Combined with our strict No China Sourcing pledge and full documentation on every order, this FSC-based approach gives buyers full confidence in what they're purchasing, from the moment they search to the moment the part ships.
