hex forged bolt and nut

hex forged bolt and nut

The screw head and ( with the outer screw thread cylinder ) is composed of two parts of a class of fasteners, and nut used for fastening, connecting the two with a through hole components. The connection form called bolt connection. As the nut from the bolt rotation, and can make the two parts separately, so the bolt connection is detachable connection.

grade:3.6 ,4.6 ,4.8 ,5.6 ,6.8 ,8.8 ,9.8 ,10.9 ,12.9