Patent ID: 7766592

Claim:
A screw nut for limiting a torque or a clamping force that is produced by screwing a screw onto a component to be fastened, comprising: a clamping body which, during screwing, comes to rest against the component to be screwed; only a single screw body with an internal thread, for screwing the screw nut onto the screw; and a spring element; wherein the clamping body and the single screw body are movably arranged in axial direction of the internal thread between an unlocked position and a locked position, wherein the clamping body and the single screw body in the locked position engage each other, having positive fit, by way of a positive-locking mechanism, and wherein when a defined clamping force is exceeded, the unlocked position where the clamping body and the single screw body disengage each other is taken up, with a restoring force continuously acting against this state transition, the restoring force generated by the spring element between the clamping body and the screw body.