Item for tightening to the correct torque, and electrical protection device comprising at least one terminal connected by means of such an item

An item for tightening two elements relative to one another by actuation of a screw, said item comprising a first part, said first part comprising a first end part forming an end piece configured to engage with the head of the screw, and a second end part configured to engage with an actuating member, such that activation of the actuating member causes turning of the screw and the tightening of the two element, said first part being configured to break into two portions upon reaching a recommended tightening torque, respectively a first portion comprising the first end part and a second portion comprising the second end part, wherein a second part is mounted tightly about the first part, a holding mechanism is provided in part on the first part and in part on the second part and being configured to retain the second portion of the first part inside the second part of the item, in order to prevent said second portion from leaving said second part of the item after rupture of the first part.