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

The AN4-27 is a 1/4-28 UNF hex-head machine bolt manufactured from alloy steel with a drilled shank for cotter pin retention. This AN-standard fastener serves as a structural connector in airframe bracket assemblies and system installations. The -27 suffix designates the grip length per AN dimensional specifications.

Installation requires pairing with an appropriate nut and cotter pin, with torque values specified in FAA AC 43.13-1B and the aircraft Illustrated Parts Catalog. Drilled shank design provides positive locking capability for safety-critical applications.

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

The AN4-27 is a 1/4-28 UNF hex-head machine bolt manufactured from alloy steel with a drilled shank for cotter pin retention. This AN-standard fastener serves as a structural connector in airframe bracket assemblies and system installations.

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

Can I order the an4-27 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.