WASHER: (P/N 690-623) - New Surplus

The 690-623 is a flat washer designed to distribute clamp load and protect bearing surfaces under bolts and nuts in aircraft assemblies. This steel washer spreads fastener pressure across a wider area, preventing surface damage to airframe brackets and structural components. Installed directly under the fastener head or nut, it maintains load retention during vibration and thermal cycling.

Conforms to AN960 or NAS1149 specifications common in general aviation. Verify dimensions in the aircraft IPC before installation.

What is the WASHER: (P/N 690-623)?

The 690-623 is a flat washer designed to distribute clamp load and protect bearing surfaces under bolts and nuts in aircraft assemblies. This steel washer spreads fastener pressure across a wider area, preventing surface damage to airframe brackets and structural components.

Does the 690-623 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 690-623 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 690-623.

Can I order the 690-623 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.