Internal Tooth Lock Washers are a type of lock washer featuring inward-facing teeth that grip the surface beneath a nut or bolt head, effectively resisting loosening through a strut-action locking mechanism. These teeth are particularly effective in minimizing the effects of vibration and shock, enhancing the stability of bolted assemblies.

Adfast Component manufactures and supplies internal tooth lock washers in a range of metric and imperial sizes to meet diverse application needs. These washers are available in various materials such as zinc-plated steel, stainless steel (304, 316, 410), phosphor bronze, copper, aluminum, and more. We also offer a variety of finishing options, including zinc plating, black oxide, yellow passivation, tin dipping, and cadmium coating, to suit different environmental and functional requirements.