WASHER (P/N an7503-39) - New Surplus

The AN7503-39 is a key washer with an integral internal lug that engages a keyway to prevent rotation. This steel fastener locks nuts or caps against axial movement on shafted components, bearing retainers, and keyed hardware. The internal key feature eliminates the need for separate locking mechanisms, providing secure fastening in aircraft systems.

Installation follows standard aerospace practices per FAA AC 43.13-1B and aircraft maintenance manuals. Cross-references to MS21258 specifications.

What is the WASHER (P/N an7503-39)?

The AN7503-39 is a key washer with an integral internal lug that engages a keyway to prevent rotation. This steel fastener locks nuts or caps against axial movement on shafted components, bearing retainers, and keyed hardware.

Does the an7503-39 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 an7503-39 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 an7503-39.

Can I order the an7503-39 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.