Self-breakable nut for screwing element of vehicle e.g. motor vehicle such as car, has angularly shifted three-dimensional cooperation elements connected to corresponding tool's three-dimensional cooperation elements to unscrew base plate

摘要

The nut (EC) has an internal housing provided with an internal threading for screwing a screw. An upper screwing part (P2) is provided with a rotation driving unit (ME) and secured to a base plate (P1) i.e. hemispherical base plate, via a connection to yield torque greater than a threshold, where the base plate is placed on an external face (FE1). Angularly shifted three-dimensional cooperation elements i.e. grooves, are connected to corresponding three-dimensional cooperation elements of a tool for unscrewing the base plate. An independent claim is also included for a tool for unscrewing a base plate of a self-breakable nut comprising an unscrewing head.