Alum #16 Locknut

The AEROQUIP Alum #16 Locknut (FCM2106) is a blue anodized aluminum bulkhead fitting nut designed for 16 AN hydraulic and pneumatic systems. This precision-engineered locknut secures critical fluid connections in aircraft, industrial, and high-performance automotive applications where reliable coupling integrity is non-negotiable. The aluminum construction with anodized finish provides corrosion resistance while maintaining lightweight characteristics essential in aerospace and performance environments.

Engineered to the 16 AN (Aviation Navy) standard, this locknut ensures proper sealing and retention of hydraulic fittings under pressure and vibration. The blue anodized finish serves both functional and identification purposes—the color coding is critical in field service and maintenance operations where technicians must quickly verify fitting size and type. Aluminum locknuts are favored in weight-sensitive applications such as aircraft systems, racing fuel systems, and aerospace hydraulics where every gram impacts performance and efficiency. The compact dimensions (2.35 x 1.1 x 3.75 inches) and minimal weight (0.05 lbs) make this component ideal for space-constrained installations.

This locknut is essential for professionals maintaining or assembling 16 AN hydraulic and pneumatic systems. Aviation maintenance technicians, aircraft restoration specialists, racing engineers, and industrial hydraulics professionals rely on AEROQUIP fittings for mission-critical applications. Whether you're rebuilding a vintage aircraft fuel system, servicing high-performance racing hydraulics, or maintaining industrial fluid lines, this certified locknut ensures leak-free, vibration-resistant connections. Each unit is sold individually, allowing precise inventory control for repairs and custom system builds.

AEROQUIP is recognized throughout the aerospace and fluid power industries for manufacturing fitting components that meet or exceed aviation standards. The 16 AN specification ensures compatibility with standard aircraft and high-performance hydraulic tubing, fittings, and adapters used globally in certified and experimental aircraft systems.