LOCKNUT (P/N a129e77) - New Surplus

The a129e77 is a steel locknut designed to prevent vibration-induced loosening of threaded fasteners in aircraft structures. This prevailing torque locknut secures AN bolts in airframe assemblies, engine mounts, and control systems where fastener retention is critical. Installation requires torquing to specification per your aircraft maintenance manual, with nylon or deformed-thread locking mechanisms providing resistance without requiring safety wire.

Conforms to aviation standards including AN365, MS21045, or equivalent specifications.

What is the LOCKNUT (P/N a129e77)?

The a129e77 is a steel locknut designed to prevent vibration-induced loosening of threaded fasteners in aircraft structures. This prevailing torque locknut secures AN bolts in airframe assemblies, engine mounts, and control systems where fastener retention is critical.

Does the a129e77 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The LOCKNUT 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 a129e77 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 a129e77.

Can I order the a129e77 in custom quantities?

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