RS PRO Stainless Steel Plain Internal Tooth Shakeproof Washer, M12, DIN 6797J

Thanks to the internal teeth that lock into place around a nut or bolthead, they provide a firm grip on your fasteners. This makes them a good choice for applications where your equipment is subjected to heavy use and frequent shocks or jolts.

These washers can improve workplace safety by helping to prevent accidents and damage caused by loose bolts and fixings. They're particularly useful for heavy industrial equipment or the transport industry, as well as other applications involving frequent vibrations or regular forceful movements.