SCREW (P/N nas1221-3e4p) - New Surplus

The NAS1221-3E4P is a close-tolerance flat countersunk screw with internal high-torque drive designed for aircraft structural fastening. This fastener provides a flush head profile that sits level with panel and cover surfaces, maintaining aerodynamic contour. Manufactured to NAS1221 specifications, it ensures consistent fit and interchangeability across aerospace applications.

Installation requires Hi-Torque tooling and torque application per NAS standards or aircraft maintenance manual specifications. Commonly used for fastening flush panels, access covers, and structural components to airframe assemblies where a recessed fastener head is required.

What is the SCREW (P/N nas1221-3e4p)?

The NAS1221-3E4P is a close-tolerance flat countersunk screw with internal high-torque drive designed for aircraft structural fastening. This fastener provides a flush head profile that sits level with panel and cover surfaces, maintaining aerodynamic contour.

Does the nas1221-3e4p 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 nas1221-3e4p 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 nas1221-3e4p.

Can I order the nas1221-3e4p 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.