... screw 2.Machine work available 3.OEM available 4.ISO9001:2000 5.Best after-sales service Product detailspan washer screw ... .Grade:4.8,6.8,8.8,10.9,12.95.Finish:zinc plated,color ... ,GB/T280014.We can supply non-standard fasteners according to customers' drawings5.Supply ability: 10000cartons ... Five High StrengthFasteners Co.,Ltd ,Shanghai Hadiwei Fasteners Co.,Ltd ,Shanghai XiajuanFasteners Co.,Ltd hex ...