TAB WASHER (P/N sp42s) - New Surplus

The sp42s is a stainless steel tab washer designed to lock threaded joints in vibration-prone aircraft assemblies. This washer installs under a bolt head or nut, with one tab bent after torqueing to prevent fastener loosening. Compatible with 3/4 inch BSF hardware and recognized under NAS classifications for aerospace applications.

The locking action resists vibration-induced loosening in airframe structures, engine mounts, and control systems. Installation follows aircraft maintenance manual procedures and FAA AC 43.13-1B guidance for proper tab bending and torque sequences.

What is the TAB WASHER (P/N sp42s)?

The sp42s is a stainless steel tab washer designed to lock threaded joints in vibration-prone aircraft assemblies. This washer installs under a bolt head or nut, with one tab bent after torqueing to prevent fastener loosening.

Does the sp42s 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 sp42s 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 sp42s.

Can I order the sp42s 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.