BOLT, MACHINE (P/N an5-21a) - New Surplus

The AN5-21A is a 5/16-inch hex head machine bolt manufactured from heat-treated alloy steel to AN standards for aircraft structural fastening. The undrilled shank design pairs with self-locking nuts to prevent fastener loosening under vibration. This bolt meets airworthiness requirements for primary and secondary structure applications across general and commercial aviation.

Installation requires matching grip length to joint thickness and applying torque per aircraft maintenance manual specifications and AN/NAS hardware guidance.

What is the BOLT, MACHINE (P/N an5-21a)?

The AN5-21A is a 5/16-inch hex head machine bolt manufactured from heat-treated alloy steel to AN standards for aircraft structural fastening. The undrilled shank design pairs with self-locking nuts to prevent fastener loosening under vibration.

What conditions is the an5-21a available in?

The an5-21a 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 an5-21a?

The an5-21a 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 an5-21a?

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.