NUT,TUBE COUPLING (P/N an818-2) - New Surplus

The AN818-2 is a tube coupling nut (B-nut) designed for 37° flared tube fittings. This fastener works with an AN819 sleeve to clamp the tube flare securely against a male fitting. The -2 designation fits 1/8 inch tubing.

Constructed from aluminum alloy per AN/SAE specifications, the nut provides reliable sealing in aircraft fluid systems. Installation involves sliding the sleeve and nut onto the flared tube, seating on the 37° cone, then torquing per maintenance manual requirements. Commonly used in aircraft pitot-static plumbing and other precision fluid line connections where leak-free performance is critical.

What is the NUT,TUBE COUPLING (P/N an818-2)?

The AN818-2 is a tube coupling nut (B-nut) designed for 37° flared tube fittings. This fastener works with an AN819 sleeve to clamp the tube flare securely against a male fitting.

Does the an818-2 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 an818-2 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 an818-2.

Can I order the an818-2 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.