Abstract: This invention relates to a safety screw assembly and operating key. The head of the screw is movable between a position where it is rotationally integral with the body and a position where it is freely rotatable. The head of the screw has on one face, an opening or a relief, that matches a relief or an imprint formed on part of the operating key. One end of the body of the screw has a stator and a rotor. The head of the screw forms a housing for receiving the rotor, and the assembly forms a translationally movable securing component which is movable between a loose position, where the head is freely rotatable and the rotor and the stator are rotationally integral, and a locked position, where the head and the stator are rotationally integral, where the key has at least one component for setting the rotor into rotation.

Abstract: This invention relates to a safety screw assembly and operating key. The head of the screw is movable between a position where it is rotationally integral with the body and a position where it is freely rotatable. The head of the screw has on one face, an opening or a relief, that matches a relief or an imprint formed on part of the operating key. One end of the body of the screw has a stator and a rotor. The head of the screw forms a housing for receiving the rotor, and the assembly forms a translationally movable securing component which is movable between a loose position, where the head is freely rotatable and the rotor and the stator are rotationally integral, and a locked position, where the head and the stator are rotationally integral, where the key has at least one component for setting the rotor into rotation.