... .Galvanized steel spring nut;4.Competitive price and good quality;5.OEM service available;6.Size:M6*6mm,M8*6mm,M8 ... ,M12*9.1mm,M12*11.9mm,1/4",3/8",5/16",1/2";We hope to receive drawings or physical samples ... . spring nut(M6,M8,M10,M12,1/4",3/8",5/16",1/2")