NUT,TUBE COUPLING (P/N an818-5d) - New Surplus

The AN818-5D is a flared tube coupling nut (B-nut) for aircraft fluid line connections. This steel nut secures a 37° flared tube to a mating fitting, creating a metal-to-metal seal that prevents leaks in fuel, hydraulic, and pneumatic systems. Sized for 5/16-inch outside diameter tubing with 1/2-20 UNF threads, it meets AN818/SAE AS5175 specifications.

Install with the corresponding AN819 sleeve and torque according to the aircraft maintenance manual for proper sealing and safety.

What is the NUT,TUBE COUPLING (P/N an818-5d)?

The AN818-5D is a flared tube coupling nut (B-nut) for aircraft fluid line connections. This steel nut secures a 37° flared tube to a mating fitting, creating a metal-to-metal seal that prevents leaks in fuel, hydraulic, and pneumatic systems.

What conditions is the an818-5d available in?

The an818-5d is currently available in the following conditions: New Surplus. Each condition reflects the part's maintenance history and certification status per FAA standards.

How do I get pricing for the an818-5d?

The an818-5d requires a custom quote. Submit a Request for Quote (RFQ) through our website or call our sales team at (904) 998-9101 for immediate pricing assistance.

Do you offer expedited shipping for the an818-5d?

Yes, we offer same-day processing on in-stock items and provide 24/7 AOG (Aircraft on Ground) support for urgent needs. Standard, expedited, and overnight shipping options are available.