NUT (P/N an818-4) - New Surplus

The AN818-4 is a tube coupling nut for 37° flared rigid tubing in aircraft hydraulic systems. This dash-4 size fits 1/4 inch tube with 7/16-20 female thread, securing a flared tube and MS20819/AN819 sleeve onto a male 37° fitting. The nut clamps the assembly together to create a leak-free hydraulic connection.

Installation requires verification of size and torque specifications in the aircraft maintenance manual. Standard hardware for general aviation and commercial aircraft fluid line assemblies.

What is the NUT (P/N an818-4)?

The AN818-4 is a tube coupling nut for 37° flared rigid tubing in aircraft hydraulic systems. This dash-4 size fits 1/4 inch tube with 7/16-20 female thread, securing a flared tube and MS20819/AN819 sleeve onto a male 37° fitting.

What conditions is the an818-4 available in?

The an818-4 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 an818-4?

The an818-4 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 an818-4?

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.