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Black Zinc Grade 4.8 8.8 Fasteners DIN933 Hex Bolt
1.Standard:DIN933, DIN931, ASME B18.2.1, ISO 4017, ISO 4014, IFI 149 2.Grade:8.8 3.Mark:According to customer's requirement 4.Size:M3-M72; 1/4"-3" 5.Finish:black 6.Material:medium carbon steel. 7.Delivery time:Normally in 30-40 days 8.Leng