... , 40Cr, 42CrMoSurface: Hot Dip Galvanized/HDG, Black, Yellow ZincThe following Grade of heavy hex nuts are also available:ASTM A194 2HM, Gr ... , masonry bolts, roofing bolts.Nuts: spring nuts, T nuts, K nuts, rivet nuts, cage nuts, lock nuts, hex nuts, hex flange nuts, wing nuts, weld nuts, square nuts, cap nuts.Washers: flat washers, spring ...