Serrated lock washer with internal teeth Material:Steel,Stainless steel Size:3MM-16MM Surface:black,Phosphated Zinc Plated Serrated lock washer with internal teeth 1.Toothed lock washer with high quality. 2.Toothed lock washer with competive price. 3.your choice,my pleasure. 4.stainless steel , steelWe can make washers according to your requirement . Serrated lock washer with internal teeth