BOLT (P/N an5-21) - New Surplus

The AN5-21 is a hex-head aircraft bolt conforming to AN (Army-Navy) specifications for structural fastening. Made from steel with 5/16-24 UNF threads and a 0.312-inch shank diameter, this bolt delivers 125,000 psi minimum tensile strength. Used in airframe structural joints where high-strength, reliable fastening is required.

Installation requires matching the correct grip length, appropriate nuts and washers, and torque per FAA AC 43.13-1B standards. Verify fitment against the aircraft's Illustrated Parts Catalog before assembly.

What is the BOLT (P/N an5-21)?

The AN5-21 is a hex-head aircraft bolt conforming to AN (Army-Navy) specifications for structural fastening. Made from steel with 5/16-24 UNF threads and a 0.

Does the an5-21 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 an5-21 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 an5-21.

Can I order the an5-21 in custom quantities?

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