Maintenance Parts Pro is a leading supplier of aerospace, defense and industrial components, covering every major Federal Supply Group (FSG) and Federal Supply Class (FSC). From FSG 12 (Fire Control) and FSG 15 (Aircraft Structural Components) to FSG 16 (Aircraft Accessories) and FSG 17 (Landing Gear Equipment), our inventory features fully traceable, MIL-SPEC and OEM-approved parts.
Understanding FSG and FSC Codes
A Federal Supply Group (FSG) is a 2-digit code used by NATO and the U.S. Department of Defense for logistics classification. Each FSG is further divided into 4-digit Federal Supply Classes (FSCs) which form the first four digits of a 13-digit National Stock Number (NSN).
FSG Example: 15 (Aircraft Components)
FSC Example: 1560 (Airframe Structural Components)
NIIN Example: Last 9 digits (01-123-4567)
NSN Example: Complete 13-digit number (1560-01-123-4567)
Key Applications
Commercial Aviation: Fast sourcing for structural airframes, flight controls, and hydraulics with full quality documentation.
Defense Logistics: Direct procurement of MIL-SPEC hardware naval equipment and tactical electronics meeting ITAR and DFARS standards.
AOG Support: 24/7/365 rapid cross-referencing and expedited shipping to minimize Aircraft On Ground downtime.
Why Choose Maintenance Parts Pro
Quality Assured: Compliant with AS9120B, ISO 9001:2015, and FAA AC 00-56B, with strict anti-counterfeit measures.
Sourcing Transparency: Strict adherence to TAA, DFARS, and No China Sourcing policies upon customer request.
15-Minute RFQ: Submit an online quote request and receive verified pricing within 15 minutes 24/7/365.
Complete Traceability: Every order from Maintenance Parts Pro includes an original Certificate of Conformance (CoC) test reports, and ATA 106 documentation.
Request a Quote Today
Submit your part number, quantity, condition (Factory New Surplus or Overhauled and delivery timeline online or contact our defense specialists directly for custom high-volume pricing and complete NSN cross-referencing support.
















