BOLT,MACHINE (P/N an4-23a) - New Surplus

The AN4-23A is a 1/4-inch hex head machine bolt with 28 UNF threads and an undrilled shank. Manufactured from alloy steel per AN/NASM hardware standards, this fastener secures structural joints and control linkages in aircraft assemblies. The undrilled shank (denoted by the "A" suffix) accommodates self-locking nuts for vibration resistance.

Installation requires confirmation of grip length and torque specifications from the aircraft's Illustrated Parts Catalog and FAA-approved maintenance data. Commonly used in general and commercial aviation for reliable, certified assembly.

What is the BOLT,MACHINE (P/N an4-23a)?

The AN4-23A is a 1/4-inch hex head machine bolt with 28 UNF threads and an undrilled shank. Manufactured from alloy steel per AN/NASM hardware standards, this fastener secures structural joints and control linkages in aircraft assemblies.

Does the an4-23a meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The BOLT,MACHINE 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 an4-23a 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 an4-23a.

Can I order the an4-23a in custom quantities?

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