Connection unit for use in e.g. commercial vehicle, has screw, and nut comprising thread area whose middle wall thickness is smaller than middle wall thickness of tool engaging area that is arranged between contact surface and thread area

摘要

The unit has a screw (5) and a nut (4) for connecting two components, where the nut has a central hole (6) and a thread (7) formed at an inner surface of the hole. The hole in a recess area adjacent to a contact surface (8) has a diameter that is larger than a groove of the thread. The nut has a thread area at its end lying opposite to the contact surface, where a middle wall thickness of the thread area is smaller than the middle wall thickness of a tool engaging area that is arranged between the contact surface and the thread area.