SCREW,CLOSE TOLERANCE (P/N nas517-4-9) - New Surplus

The NAS517-4-9 is a 100° flush head machine screw with close tolerances for precision airframe assembly. Manufactured from alloy steel with a 1/4-28 UNF thread and cross-recess drive, this fastener is designed for shear-loaded joints where minimal play and precise alignment are critical. Used in close-fit structural connections throughout aircraft fuselage and wing assemblies.

Installation requires adherence to NAS517 dimensional specifications and torque values specified in the aircraft maintenance manual. Periodic inspection ensures fastener integrity under flight loads and vibration.

What is the SCREW,CLOSE TOLERANCE (P/N nas517-4-9)?

The NAS517-4-9 is a 100° flush head machine screw with close tolerances for precision airframe assembly. Manufactured from alloy steel with a 1/4-28 UNF thread and cross-recess drive, this fastener is designed for shear-loaded joints where minimal play and precise alignment are critical.

What conditions is the nas517-4-9 available in?

The nas517-4-9 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 nas517-4-9?

The nas517-4-9 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 nas517-4-9?

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.