NUT,TUBE COUPLING (P/N an818-8) - New Surplus

The AN818-8 is a tube coupling nut for 37-degree flared tube assemblies. This steel nut secures 1/2-inch tubing to standard aircraft fittings using 3/4-16 UNF-3B threads. Used in aircraft fuel systems, it pairs with an AN819 sleeve and matching flared fitting to create a leak-free connection.

Assembly involves threading the nut onto the fitting body with the sleeve positioned between the nut and flared tube end. Torque specifications follow aircraft maintenance manual requirements and applicable AN/SAE standards for fuel system integrity.

What is the NUT,TUBE COUPLING (P/N an818-8)?

The AN818-8 is a tube coupling nut for 37-degree flared tube assemblies. This steel nut secures 1/2-inch tubing to standard aircraft fittings using 3/4-16 UNF-3B threads.

Does the an818-8 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The NUT,TUBE COUPLING conforms to its applicable AN (Air Force-Navy), MS (Military Standard), or NAS (National Aerospace Standard) specification. Contact us for specific specification details.

What material is the an818-8 manufactured from?

Aviation hardware is available in various materials including cadmium-plated steel, stainless steel, aluminum alloy, and titanium depending on the application. Contact us for material certification and specifications for the an818-8.

Can I order the an818-8 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The NUT,TUBE COUPLING is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.