... Rod Bolt,Wheel Bolt,Torsion BarEngine Connecting Rod Bolt Specifications of Engine Connecting Rod Bolt: 1) Standard diameter: Φ6-36mm2) Raw ... .8, 10.9, 12.9, all specifications are available. The standard diameter of high strength bolt isΦ6mm-36mm, The ... in designing and manufacturing of high strength bolts, threaded fasteners, speed governor, connecting rod assembly, engine timing gear box and ...