NUT,SELF-LOCKING,EXTENDED WASHER,H (P/N ms21043-5) - New Surplus

The MS21043-5 is a self-locking hex nut with an extended washer and all-metal prevailing-torque design. This corrosion and heat-resistant steel fastener features a 5/16-24 UNJF-3B internal thread conforming to Military Standard MS21043. The extended washer base distributes load across a wider surface area, reducing bearing stress on composite or thin-gauge materials.

The integral locking mechanism resists vibration loosening without thread-locking compounds. Used in airframe and nacelle applications where reliable fastening under flight loads is critical. Install on clean, dry threads and torque per MS/NAS specifications or aircraft maintenance manual requirements.

What is the NUT,SELF-LOCKING,EXTENDED WASHER,H (P/N ms21043-5)?

The MS21043-5 is a self-locking hex nut with an extended washer and all-metal prevailing-torque design. This corrosion and heat-resistant steel fastener features a 5/16-24 UNJF-3B internal thread conforming to Military Standard MS21043.

Does the ms21043-5 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The NUT,SELF-LOCKING,EXTENDED WASHER,H 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 ms21043-5 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 ms21043-5.

Can I order the ms21043-5 in custom quantities?

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