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

The AN818-8D is an aluminum tube coupling nut (B-nut) designed for 37-degree flared tubing connections. It features 3/4-16 internal threads to accommodate 1/2-inch tube outside diameter. This nut clamps a sleeve and flare against a male AN fitting, creating a metal-to-metal seal in aircraft fuel line systems.

Used with matching AN819 sleeve, the coupling nut requires torque application per applicable aircraft maintenance manual specifications. Standard hardware in general aviation and commercial aircraft fuel system installations.

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

The AN818-8D is an aluminum tube coupling nut (B-nut) designed for 37-degree flared tubing connections. It features 3/4-16 internal threads to accommodate 1/2-inch tube outside diameter.

Does the an818-8d 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 an818-8d 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 an818-8d.

Can I order the an818-8d 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.