TAB WASHER (P/N sp42n) - New Surplus

The sp42n is a steel tab washer designed for mechanical locking of fasteners under vibration. This split-ring washer installs under a nut or bolt, with one tab engaging a flat surface or keyway to prevent rotation. After torquing the fastener, the tab is bent to lock against the mounting surface.

Comparable to NAS513 and DIN tab-washer standards, it's commonly used in aircraft engine mounts and structural applications. Verify the applicable IPC for correct installation orientation and engagement depth before assembly.

What is the TAB WASHER (P/N sp42n)?

The sp42n is a steel tab washer designed for mechanical locking of fasteners under vibration. This split-ring washer installs under a nut or bolt, with one tab engaging a flat surface or keyway to prevent rotation.

Does the sp42n meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The TAB 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 sp42n 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 sp42n.

Can I order the sp42n in custom quantities?

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