... " Grade:Grade2,5,8,2H,7M,8,8M Finish:Passivated,Black Oxide,Zinc,H.D.G,Dacromet,Mechanical Galvanized IFI145 Size:#6 ... " Grade:Grade2,5,8,2H,7M,8,8M Finish:Passivated,Black Oxide,Zinc,H.D.G,Dacromet,Mechanical Galvanized hex flange nuts ... , such as bright, zinc plated, hot-dip galvanized,mechanical plating, black 4) Can be made with different standards, such as ISO ...