... Bolt,Torsion BarEngine Connecting Rod Bolt Specifications of Engine Connecting Rod Bolt: 1) Standard diameter: Φ6 ... include flange nut , hex nut and self-locking nut, the strength grades of them are 4 ... include flange nut , hex nut and self-locking nut, the strength grades of them are 4 ... fasteners, speed governor, connecting rod assembly, engine timing gear box and other mechanical products. Fastener