WASHER (P/N 2-161-4) - New Surplus

The 2-161-4 is a flat washer that distributes clamping loads and provides a smooth bearing surface under bolted joints. Made of steel, this washer conforms to AN960 or NAS1149 standards and is installed beneath hex nuts in airframe structural connections. The washer helps prevent fastener rotation and protects the underlying material from bearing stress during assembly and flight operations.

Installation follows aircraft maintenance manual specifications, verifying that inner diameter, outer diameter, and thickness match the selected bolt size.

What is the WASHER (P/N 2-161-4)?

The 2-161-4 is a flat washer that distributes clamping loads and provides a smooth bearing surface under bolted joints. Made of steel, this washer conforms to AN960 or NAS1149 standards and is installed beneath hex nuts in airframe structural connections.

Does the 2-161-4 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The WASHER 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 2-161-4 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 2-161-4.

Can I order the 2-161-4 in custom quantities?

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