| 摘要 |
A fastening element having a torque-receiver for a setting tool and having a shank bearing a tapping thread that has a free end facing away from the torque-receiving means, and that has a thread-core diameter. The thread has one thread having a thread leading end in the region of the free end of the shank, whose outside diameter, starting from the free end, increases to a maximum outside diameter and, starting from its maximum outside diameter and continuing toward the torque-receiving means, decreases quasi-continuously to a smaller outside diameter. The thread-core diameter of the shank, starting from a region next to the torque-receiving means and continuing toward the free end of the shank, decreases quasi-continuously to a smaller thread-core diameter of the shank. |
