hex forged bolt and nut MOQ:50PCS grade:3.6 ,4.6 ,4.8 , ... cylinder ) is composed of two parts of a class of fasteners, and nut used for fastening, connecting the two with a through ... called bolt connection. As the nut from the bolt rotation, and can make the two parts separately, so the bolt connection ... .8 ,9.8 ,10.9 ,12.9 hex forged bolt and nut