... 4--3",m4-m72 coating :zinc,plain ,HDG din985(hex nylon lock nuts)size :1/4--3",m4-m72coating :zinc,plain ... steel , stainless ,brassMaterial: Carbon Steel, Alloy Steel, Stainless Steel, Copper, Nylon, Plastic, etc. Our biggest strength is non-standard product according ... flange bolts, carrage bolts, wheel bolts, stud boltsNUTS: hex nuts, heavy hex nuts, hex flange nuts, nylon insert lock nuts, cap nuts ...