... Finish:Plain,ZP,YZP,Black,HDG,Nickel External teeth serrated lock washersMaterial: Carbon steel, mild steel, stainless steelFinish:Plain ... nuts, heavy hex nuts, hex flange nuts, nylon insert lock nuts, cap nuts, slotted nuts, rivet nutWASHERS: flat washers ... , spring washers, lock washersSCREWS: machine screws, self tapping screws, set screws, hex socket head cap screws, ...