Separable mounting device including a screw for an electrical apparatus

摘要

The head for tightening a screw (10) with a limited torque has a driving cylinder (12) with hexagonal fittings (32,26) to receive and transmit torque, a knurled zone (42) and a weakened zone (38) which ruptures at a preset torque. The cylinder and screw head are enclosed in a synthetic sheath (14) which twists off at a neck (50) leaving both the cylinder and the screw head insulated but separated An Independent claim is also included for : An electrical terminal kit which uses a screw with the tightening head