... Galvanized; 3.Good price and quality; Metal stamping part/channel nutchannel nut(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 ... ,M12*9.1mm,M12*11.9mm,1/4",3/8",5/16",1/2" )We hope to receive drawings ...