DIN7504 carbon steel screw with rubber washer 1.Material: C1022 hardened 2.Size: from #4 to #14, equal ST2.2 to 6.3 DIN7504 carbon steel screw with rubber washer 1.Material: C1022 hardened2.Size: from #4 to #14, equal ST2.2 to 6.3 3.Finish:plain, zinc plated, hdg 4.Packing: Standard export packing or According to customer's requirement DIN7504 carbon steel screw with rubber washer