WASHER 3/8 UN (P/N sp126-j) - New Surplus

The sp126-j is a 3/8-inch UN flat washer designed to distribute clamp load under bolt heads and nuts in aircraft structural assemblies. Manufactured from steel per AN960 or NAS1149 specifications, this washer protects bearing surfaces and prevents fastener pull-through on airframe brackets and system components. Install directly under the bolt head or nut, then torque per FAA AC 43.13-1B guidance and applicable maintenance documentation.

Commonly used in general and commercial aviation where 3/8 UN fastener systems require load distribution and surface protection.

What is the WASHER 3/8 UN (P/N sp126-j)?

The sp126-j is a 3/8-inch UN flat washer designed to distribute clamp load under bolt heads and nuts in aircraft structural assemblies. Manufactured from steel per AN960 or NAS1149 specifications, this washer protects bearing surfaces and prevents fastener pull-through on airframe brackets and system components.

Does the sp126-j meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The WASHER 3/8 UN 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 sp126-j 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 sp126-j.

Can I order the sp126-j in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The WASHER 3/8 UN is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.