BOLT,MACHINE (P/N an4-43a) - New Surplus

The AN4-43A is a 1/4-28 UNF hex-head machine bolt conforming to AN/NASM4 specifications. The undrilled shank (indicated by the 'A' suffix) accommodates stop-nut applications in aircraft control linkages and structural assemblies. Manufactured from high-strength alloy steel, this bolt provides reliable fastening in vibration-prone environments.

Installation requires torque application per the aircraft maintenance manual and FAA AC 43.13-1B guidance. Verify grip length compatibility with your aircraft's Illustrated Parts Catalog before use.

What is the BOLT,MACHINE (P/N an4-43a)?

The AN4-43A is a 1/4-28 UNF hex-head machine bolt conforming to AN/NASM4 specifications. The undrilled shank (indicated by the 'A' suffix) accommodates stop-nut applications in aircraft control linkages and structural assemblies.

Does the an4-43a 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 an4-43a 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 an4-43a.

Can I order the an4-43a 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.