... M6,M8,M10,M12,1/2",1/4",5/16",3/8"): 1.Material:carbon steel;2 ... .Surface treament:nickel plating,,zinc plating,galvanized,hot dipped and so on;3.Stainless steel 304 or ... 316 or ... .9mm,1/4",3/8",5/16",1/2" )We hope to receive drawings or physical ...