NUT,TUBE COUPLING (P/N an818-6) - New Surplus

The AN818-6 is a tube coupling nut conforming to Army-Navy standards for aircraft fluid systems. This -6 dash size nut secures 3/8-inch outside diameter flared tubing to mating fittings when paired with an AN819 sleeve. Assembly involves sliding the nut and sleeve over the tube, creating a 37-degree flare, then torquing to specification per the aircraft maintenance manual.

Commonly used in aircraft hydraulic line connections where leak-free, vibration-resistant joints are critical. The nut provides reliable pressure sealing in high-vibration engine and system environments.

What is the NUT,TUBE COUPLING (P/N an818-6)?

The AN818-6 is a tube coupling nut conforming to Army-Navy standards for aircraft fluid systems. This -6 dash size nut secures 3/8-inch outside diameter flared tubing to mating fittings when paired with an AN819 sleeve.

Does the an818-6 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 an818-6 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 an818-6.

Can I order the an818-6 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.