WASHER (P/N a-1638-8) - New Surplus

The a-1638-8 is a flat washer for McCauley propeller assembly hardware. It distributes clamp load under bolts and nuts while protecting bearing surfaces in the propeller hub stack. Steel construction meets AN960 specifications (superseded by NAS1149).

Install under the nut in the propeller fastener assembly, positioning per the aircraft IPC and McCauley propeller manual. Torque fasteners according to FAA AC 43.13-1B guidance. Verify correct size and location before installation to ensure proper load distribution and bearing protection.

What is the WASHER (P/N a-1638-8)?

The a-1638-8 is a flat washer for McCauley propeller assembly hardware. It distributes clamp load under bolts and nuts while protecting bearing surfaces in the propeller hub stack.

Does the a-1638-8 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 a-1638-8 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 a-1638-8.

Can I order the a-1638-8 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.