BOLT, REDUCED CSK HD (P/N nas8603-6) - New Surplus

The NAS8603-6 is a reduced countersunk head bolt with a 100° flat profile and cross-recess drive. This close-tolerance fastener conforms to NAS8603 specifications and features UNJF threads for precise fit in aircraft structural applications. Designed for flush skin-to-structure joints where aerodynamic surfaces require seamless interfaces.

Install into prepared countersinks and torque according to aircraft maintenance manual specifications. Verify grip length against the Illustrated Parts Catalog before installation to ensure proper clamping force and structural integrity.

What is the BOLT, REDUCED CSK HD (P/N nas8603-6)?

The NAS8603-6 is a reduced countersunk head bolt with a 100° flat profile and cross-recess drive. This close-tolerance fastener conforms to NAS8603 specifications and features UNJF threads for precise fit in aircraft structural applications.

What conditions is the nas8603-6 available in?

The nas8603-6 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 nas8603-6?

The nas8603-6 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 nas8603-6?

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.