Stainless Steel Tooth Lock Washer DIN 6798 A, J, VSerrated External / Internal / Countersunk Lock Washers.DIN 6798 A,J: M1.5~M30DIN 6798 V: 2.2-17mmMaterial: Stainless Steel ANSI 420, 304, 316.Surface Finish: Natural.Size, thickness, style or other specifications can be designed according to your demand.