BOLT (P/N an4h12a) - New Surplus

The AN4H12A is a 1/4-28 UNF hex bolt manufactured from alloy steel for aircraft structural and systems attachments. The bolt features a drilled head for safety wire installation and an undrilled shank. Commonly used in airframe assemblies and engine accessory installations where reliable fastening and vibration resistance are required.

Installation requires an approved self-locking nut or per aircraft design specifications, with torque and safety-wire procedures following FAA AC 43.13-1B and the applicable aircraft maintenance manual.

What is the BOLT (P/N an4h12a)?

The AN4H12A is a 1/4-28 UNF hex bolt manufactured from alloy steel for aircraft structural and systems attachments. The bolt features a drilled head for safety wire installation and an undrilled shank.

Does the an4h12a 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 an4h12a 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 an4h12a.

Can I order the an4h12a 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.