Screw for screwing on workpiece, has circumference contour rotated by associated multi-edge nut, and screw head not-threaded by multi-edge nut while rotating screw head in reverse rotation direction by multi-edge nut

摘要

The screw has a screw head (2) and a bolt shank, where the screw head includes a circumference contour in an unstressed output state. The circumference contour is rotated by an associated multi-edge nut, and is elastically compressed in screw-in direction while achieving a predetermined rotational torque. The screw head is not-threaded by the multi-edge nut while rotating the screw head in a reverse rotation direction by the multi-edge nut. The screw head includes bars (3) that are elastically and laterally bent, and projection parts (5) are formed in head ends of the bar. The screw is made of hard, resilient deformable plastic or metal materials.