| 摘要 |
The fastening element consists of a shaft (1) a drill head (2) arranged on its end in the driving-in direction, a means (3) of applying a load which is connected to the shaft (1) and is located opposite to the drill head (2), and a means (4) of providing a rotating drive, having engagement surfaces. The fastening element is suitable for driving in into hard materials, in that, when it is rotated, it drills a blind hole and is driven into its final position by means of impact force. …<IMAGE>… |
