screws and fasteners manufacturer in china Thread Standard ISO, GB, DIN, JIS, ANSI, BSW, ASME Raw Material1.Stainless Steel: SS201, SS303, SS304, SS316, SS410, SS4202.Steel:1213, 12L14,1215,1018, 1010, C45(K1045), C46(K1046),C203.Brass:C36000 ( C26800), C37700 ( HPb59), C38500(..