BOLT (P/N as21548) - New

The AS21548 is a machine bolt conforming to SAE Aerospace Standard AS21500-4, featuring a double-hex extended-washer-head design with 1/4-28 UNJF-3A thread. This fastener provides controlled preload in aerospace structural joints where compact head geometry and fine-pitch threading are specified. Commonly used in airframe connections requiring precision torque application and load distribution.

Installation requires verification of bolt length and grip distance for the specific joint, with torque values specified in the aircraft maintenance manual.

What is the BOLT (P/N as21548)?

The AS21548 is a machine bolt conforming to SAE Aerospace Standard AS21500-4, featuring a double-hex extended-washer-head design with 1/4-28 UNJF-3A thread. This fastener provides controlled preload in aerospace structural joints where compact head geometry and fine-pitch threading are specified.

Does the as21548 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The BOLT 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 as21548 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 as21548.

Can I order the as21548 in custom quantities?

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