Hard lock nut 1.Material:Carbon&stainless steel 2.Size: ... Zinc,Nickel plated,Black Oxide,HDG 4.SGS,ISO approve Hard lock nut 1. Standard:DIN, ANSI,BSW, JSB ans ... SS316 A4 etc), Brass or according require.3. Grade of Hard lock nut: Metric standard: Grade 4.8, Grade6.8, ... , Galvanized with Zinc, HDGSizeM3-M64Thickness3.2mm-51mmPitch0.25mm-6mmHard lock nut Product pohot examples: If you have any question, ...