Size:#6-3/4" Grade:Grade2,5,8,2H,7M,8,8M Finish:Passivated,Black Oxide,Zinc,H.D.G,Dacromet,Mechanical Galvanized hex flange nuts IFI145Material:Stainless Steel,Carbon Steel,Alloy Steel1) Various kinds of screws available2) Can be made with different tensile strength, such as Grade2,Grade5,Grade83) Can be supplied with different finish, such as bright, zinc plated, hot-dip galvanized,mechanical ...