hex forged bolt and nut MOQ:50PCS grade:3.6 ,4.6 , ... .8 ,8.8 ,9.8 ,10.9 ,12.9 hex forged bolt and nutThe screw head and ( with the outer screw ... of a class of fasteners, and nut used for fastening, connecting the two with a through hole components. The connection form ... .8 ,8.8 ,9.8 ,10.9 ,12.9 hex forged bolt and nut