Abstract: A shear screw has predetermined breaking points in two planes, separated axially from one another, and it has centrally a blind hole extending over a substantial length and having a cross section which is suitable for transmitting a torque to the shear screw by means of a pin-like tool of adapted dimensions which can be inserted into the blind hole. The blind hole extends to about level with the predetermined breaking point which is arranged in the lower region, facing the end face of the shear screw, of the latter and has a strength greater than that of the other predetermined breaking point.

Abstract: What is specified is a clamping screw (2) for fastening an electrical conductor in a metallic terminal which is designed as a tubular piece and which in its wall has at least one through hole provided with a thread and intended for receiving the clamping screw. A rotating element (10) which can rotate about at least one axis is mounted on that end of the clamping screw (2) which serves for bearing against the electrical conductor.

Abstract: What is specified is a clamping screw (2) for fastening an electrical conductor in a metallic terminal which is designed as a tubular piece and which in its wall has at least one through hole provided with a thread and intended for receiving the clamping screw. A rotating element (10) which can rotate about at least one axis is mounted on that end of the clamping screw (2) which serves for bearing against the electrical conductor.