LOCKNUT,TUBE FITTING (P/N an6289d4) - New Surplus

The AN6289D4 is a tube fitting locknut designed to secure and seal tube couplings in aircraft fluid systems. Manufactured from aerospace-grade aluminum alloy, this locknut features a counterbored face that captures packing material and maintains seal integrity under pressure. It locks the mating fitting while compressing the seal to prevent leakage in fuel, hydraulic, and pneumatic lines.

Installation and torque specifications follow AS5179/MIL-F-5509 standards and the applicable aircraft maintenance manual. Commonly used in aircraft manifolds and fluid line assemblies where reliable, leak-free connections are critical.

What is the LOCKNUT,TUBE FITTING (P/N an6289d4)?

The AN6289D4 is a tube fitting locknut designed to secure and seal tube couplings in aircraft fluid systems. Manufactured from aerospace-grade aluminum alloy, this locknut features a counterbored face that captures packing material and maintains seal integrity under pressure.

Does the an6289d4 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The LOCKNUT,TUBE FITTING 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 an6289d4 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 an6289d4.

Can I order the an6289d4 in custom quantities?

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