Rivet fastening bolt with the traditional use of different fastening force produced by the rotation torque, rivet fasteners use Hooke's law principle, via rivet special equipment, the role of the one-way tension, tension bolt lever and push sleeve ring, the inner smooth collar pressed into the screw groove is formed so that the collar and bolts 100% combined to produce permanent tightening force. Rivet fastening principle is from this source. Rivet www. lpmaoding. Com