Product Name: Serrated Lock Washer / Tooth Lock Washer (DIN6797) Model NO.: DIN 6797 A, J Spring Washer Type: Standard Combination Washer Packaging: Half a Pack Combination Washer Structure: DIN 6797 a, J Material: Carbon Steel, Stainless Steel Type: Lock Washer Serrated Lock Washer: Tooth Washer, Teeth Washer, Lock Washer DIN6797: Tooth Lock Washers DIN6797 Trademark: Sea Song Transport Package: Inner Box + Outer Carton + Wooden Case Specification: DIN, ANSI, BS, UNI Origin: China HS Code: 7318 Product Description Serrated / Tooth Lock Washer DIN 6797 A, JSerrated External / Internal Lock Washers. Size: M1.5~M30 Material: Carbon spring steel Mn65. Stainless Steel ANSI 420, 304, 316.Surface Finish: Black Oxide, Zinc plating, Plain. Size, thickness, style or other specifications can be designed according to your demand.