NUT (P/N 290-6d) - New Surplus

The 290-6D is a tube coupling nut for 37-degree flared aircraft fluid lines, cross-referencing AN818-6D specifications. This nut clamps a flared tube and sleeve against a mating fitting to create a metal-to-metal seal in hydraulic, fuel, and pneumatic systems. Installed with an AN819 sleeve, the coupling nut torques per maintenance manual procedures to secure Aeroquip 303/306 hose and tube assemblies.

Steel construction withstands high-pressure fluid system environments. Essential for leak-free connections in aircraft fuel, hydraulic, and environmental control lines.

What is the NUT (P/N 290-6d)?

The 290-6D is a tube coupling nut for 37-degree flared aircraft fluid lines, cross-referencing AN818-6D specifications. This nut clamps a flared tube and sleeve against a mating fitting to create a metal-to-metal seal in hydraulic, fuel, and pneumatic systems.

Does the 290-6d 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 290-6d 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 290-6d.

Can I order the 290-6d 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.