High strength coupling Long Nut 1.Material:carton steel 2.Grade :4.8~8.8 3.Finished:black,zinc ... Long Nut 1 Size of nuts : M3-M362 Material : carbon steel, alloy steel3 Standard : DIN,GB,JIS,BSW4 Surface:accroding to ... , heavy hex bolts, hex flange bolts, carrage bolts, wheel bolts, stud boltsNUTS: hex nuts, heavy hex nuts, hex flange nuts, nylon ...