SCREW (P/N an509-8r4) - New Surplus

The AN509-8R4 is a countersunk machine screw with cross-recessed Phillips head, conforming to AN509 standard specifications. This fastener creates flush surfaces in sheet-metal airframe structures by seating into a properly prepared countersink. Steel construction provides strength for structural attachment applications.

Used to secure thin-gauge aluminum panels and components during aircraft assembly and maintenance. Installation requires matching the countersink depth and angle to the screw head, then tightening to torque specifications outlined in the aircraft maintenance manual or structural repair manual.

What is the SCREW (P/N an509-8r4)?

The AN509-8R4 is a countersunk machine screw with cross-recessed Phillips head, conforming to AN509 standard specifications. This fastener creates flush surfaces in sheet-metal airframe structures by seating into a properly prepared countersink.

Does the an509-8r4 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The SCREW 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 an509-8r4 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 an509-8r4.

Can I order the an509-8r4 in custom quantities?

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