BOLT (P/N an4-25) - New Surplus

The AN4-25 is a 1/4-inch hex head aircraft bolt with 28 threads per inch (UNF) in high-strength alloy steel. This AN-series fastener meets AN/NASM4 specifications for structural applications requiring reliable shear load carrying capacity. Commonly used in aircraft brackets, fittings, and control linkages where precision fastening is critical.

Installation requires matching grip length to stack thickness and following torque specifications from the aircraft maintenance manual. Secure with appropriate safety wire or self-locking nuts per FAA AC 43.13 guidance.

What is the BOLT (P/N an4-25)?

The AN4-25 is a 1/4-inch hex head aircraft bolt with 28 threads per inch (UNF) in high-strength alloy steel. This AN-series fastener meets AN/NASM4 specifications for structural applications requiring reliable shear load carrying capacity.

What conditions is the an4-25 available in?

The an4-25 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 an4-25?

The an4-25 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 an4-25?

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.