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.

Does the nas517-4-14 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The SCREW, CSK HD conforms to its applicable AN (Air Force-Navy), MS (Military Standard), or NAS (National Aerospace Standard) specification. Contact us for specific specification details.

What material is the nas517-4-14 manufactured from?

Aviation hardware is available in various materials including cadmium-plated steel, stainless steel, aluminum alloy, and titanium depending on the application. Contact us for material certification and specifications for the nas517-4-14.

Can I order the nas517-4-14 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The SCREW, CSK HD is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.