NUT (P/N ms21045-5) - New Surplus

The MS21045-5 is a self-locking hex nut with all-metal prevailing-torque design built to Military Standard MS21045. Manufactured from steel with 5/16-24 UNJF threads, this nut maintains secure fastening under vibration and thermal cycling common in aircraft service. The prevailing-torque mechanism resists loosening without deforming the bolt or stud, making it ideal for airframe brackets, engine mounts, and structural assemblies.

Install on 5/16-24 bolts or studs, ensuring proper thread engagement and applying torque per the applicable aircraft maintenance manual.

What is the NUT (P/N ms21045-5)?

The MS21045-5 is a self-locking hex nut with all-metal prevailing-torque design built to Military Standard MS21045. Manufactured from steel with 5/16-24 UNJF threads, this nut maintains secure fastening under vibration and thermal cycling common in aircraft service.

Does the ms21045-5 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 ms21045-5 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 ms21045-5.

Can I order the ms21045-5 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.