SECURING DEVICE

摘要

In a securing device there are a metal plug (1) and a screw (2). One end of the plug has longitudinal slots (3) to form an expansion region (S). To prevent the metal plug (1) from turning in the drilling, it has a conical broadened region (8) so that the metal plug fits tightly against the wall of the drilling. The pressure of the expansion region is produced by making no thread in the transition aperture and providing the radial load by the shape or cut of the thread.