BOLT,MACHINE (P/N an4-27a) - New Surplus

The AN4-27A is a 1/4-28 UNF hex head machine bolt manufactured from alloy steel per AN/NASM standards. The undrilled shank (denoted by the 'A' suffix) pairs with self-locking nuts for secure fastening without additional locking mechanisms. Used in aircraft structural joints where precise grip length is critical.

Installation requires matching the bolt to IPC grip callouts, pairing with specified washers and self-locking nuts, and torquing per applicable maintenance manual requirements. Standard aerospace fastener for general airframe assembly and repair.

What is the BOLT,MACHINE (P/N an4-27a)?

The AN4-27A is a 1/4-28 UNF hex head machine bolt manufactured from alloy steel per AN/NASM standards. The undrilled shank (denoted by the 'A' suffix) pairs with self-locking nuts for secure fastening without additional locking mechanisms.

Does the an4-27a 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 an4-27a 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 an4-27a.

Can I order the an4-27a 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.