2, threaded terminal, the self-locking ability of the screw plays a decisive factor. The general self-locking principle of the terminal screw is based on the principle of "lifting cylinder". When the screw is tightened, the tightening force of the screw does not directly act on the wire. It acts on the clamping member, and the resulting automatic stepping self-locking causes the thread friction to increase gradually, realizing the self-locking of the screw, and finally clamping the wire on the conductive strip.

3. There are different torque requirements for different thread diameters. For example, the M3 crimping screw requires 80N torque to not damage the terminal.