... steel 2.Size:M3-M64 3.Finish.Zinc,Nickel plated,Black Oxide,HDG 4.SGS,ISO Nylon insert lock nut 1 ... . OEM&Customize non-standard products welcome.6. Surface treatment:black finished, Zinc plated (Galv), Hot Dip Galvanized, Nickel, phosphate ... steel series,carbon steel, Brass or as request.FinishPlain, Black, Galvanized with Zinc, HDGSizeM3-M64Thickness3.2mm-51mmPitch0.25mm-6mmNylon insert lock nut ...