BOLT (P/N an3-21a) - New Surplus

The AN3-21A is a hex-head airframe bolt manufactured from alloy steel with UNF Class 3A threads. This AN3/NASM3-conforming fastener features an undrilled shank designed for use with self-locking nuts in structural applications. Used to secure brackets and components in airframe assemblies, the bolt provides reliable fastening where vibration resistance is critical.

Installation requires a compatible self-locking nut and proper grip length selection. Torque specifications should follow the applicable aircraft maintenance manual for the airframe type.

What is the BOLT (P/N an3-21a)?

The AN3-21A is a hex-head airframe bolt manufactured from alloy steel with UNF Class 3A threads. This AN3/NASM3-conforming fastener features an undrilled shank designed for use with self-locking nuts in structural applications.

Does the an3-21a 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 an3-21a 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 an3-21a.

Can I order the an3-21a 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.