| 摘要 |
1. A device for immobilizing a screw or a nut (20, 40) in or on a thread, comprising a spiral spring element (12, 42) having at least three fourth of a winding cooperating with an end of the screw or the nut (20, 40), characterized in that the screw or the nut (20, 40) is supplied with a cylindrical shoulder (21, 41) serving as a housing for at least part of the spiral spring element (12, 42). |
