WASHER (P/N an1657-7) - Serviceable

The AN1657-7 is a steel flat washer designed to distribute bearing load and protect mating surfaces in bolted aircraft joints. This fastener component conforms to AN960 specifications and installs beneath bolt heads or nuts to prevent fasteners from pulling through softer materials. Steel construction provides durability in high-stress applications across fuselage, wing, and structural assemblies.

Installation follows FAA AC 43.13-1B guidance, matching washer size to fastener diameter and limiting total washer stack to 1/8-inch per applicable maintenance manuals. Essential for maintaining joint integrity in aircraft maintenance and assembly.

What is the WASHER (P/N an1657-7)?

The AN1657-7 is a steel flat washer designed to distribute bearing load and protect mating surfaces in bolted aircraft joints. This fastener component conforms to AN960 specifications and installs beneath bolt heads or nuts to prevent fasteners from pulling through softer materials.

Does the an1657-7 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 an1657-7 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 an1657-7.

Can I order the an1657-7 in custom quantities?

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