SCREW, CSK HD (P/N nas517-4-14) - New Surplus

The NAS517-4-14 is a close-tolerance flat countersunk head machine screw with a 100° head profile and UNF threads. Manufactured from steel, this fastener provides flush panel fastening in aircraft structural assemblies where a smooth aerodynamic surface is critical. The countersunk design allows the screw head to sit flush with the surrounding material, eliminating protrusions that could disrupt airflow or create snag points.

Installation requires verification of length and grip specifications against the aircraft's Illustrated Parts Catalog and compliance with NAS517 standards. Commonly used in fuselage skin attachment, control surface fastening, and interior panel applications.

What is the SCREW, CSK HD (P/N nas517-4-14)?

The NAS517-4-14 is a close-tolerance flat countersunk head machine screw with a 100° head profile and UNF threads. Manufactured from steel, this fastener provides flush panel fastening in aircraft structural assemblies where a smooth aerodynamic surface is critical.

What conditions is the nas517-4-14 available in?

The nas517-4-14 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 nas517-4-14?

The nas517-4-14 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 nas517-4-14?

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.