Internal Tooth Lock Washers are a type of locking washer featuring teeth along the inner circumference. These teeth provide a firm grip on the fastener head or nut, using a strut-like mechanism to resist loosening caused by vibrations and dynamic loads. Their design makes them particularly effective at maintaining joint integrity in applications prone to shock and movement.

Adfast Component supplies internal tooth lock washers in both metric and imperial standards, catering to diverse industrial requirements. These washers are commonly manufactured from materials such as zinc-plated steel, stainless steel (304, 316, 410), phosphor bronze, copper, and aluminum. Surface finishes available include black oxide, zinc plating, tin coating, yellow passivation, and cadmium plating, providing enhanced corrosion resistance and performance.