BOLT,MACHINE (P/N an4-4) - New Surplus

The AN4-4 is a 1/4-28 UNF hex head machine bolt conforming to AN4/NASM4 specifications. Manufactured from alloy steel, this bolt features a drilled shank for cotter-pin locking to prevent fastener rotation. The dash number indicates grip length; select the appropriate length to match your joint stack-up.

Commonly used in airframe bracket assemblies and structural connections. Install with a castellated nut and cotter pin, then torque per FAA AC 43.13-1B guidance. Verify proper grip length and thread engagement before final installation.

What is the BOLT,MACHINE (P/N an4-4)?

The AN4-4 is a 1/4-28 UNF hex head machine bolt conforming to AN4/NASM4 specifications. Manufactured from alloy steel, this bolt features a drilled shank for cotter-pin locking to prevent fastener rotation.

What conditions is the an4-4 available in?

The an4-4 is currently available in the following conditions: New Surplus. Each condition reflects the part's maintenance history and certification status per FAA standards.

How do I get pricing for the an4-4?

The an4-4 requires a custom quote. Submit a Request for Quote (RFQ) through our website or call our sales team at (904) 998-9101 for immediate pricing assistance.

Do you offer expedited shipping for the an4-4?

Yes, we offer same-day processing on in-stock items and provide 24/7 AOG (Aircraft on Ground) support for urgent needs. Standard, expedited, and overnight shipping options are available.