NUT (P/N an818-6d) - New Surplus

The AN818-6D is an aluminum tube coupling nut for 37° flared connections on 3/8-inch tubing. It features 9/16-18 threads and conforms to AN818/SAE AS4841 standards. Used with an AN819 sleeve, this nut secures flared tube joints in aircraft hydraulic systems while maintaining leak-tight integrity.

Installation requires properly flared tubing and torque per the aircraft maintenance manual specifications.

What is the NUT (P/N an818-6d)?

The AN818-6D is an aluminum tube coupling nut for 37° flared connections on 3/8-inch tubing. It features 9/16-18 threads and conforms to AN818/SAE AS4841 standards.

Does the an818-6d meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The NUT 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 an818-6d 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 an818-6d.

Can I order the an818-6d in custom quantities?

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