| 摘要 |
In a screw for fastening metal sections (10) to a substructure (11), a shank (2) is provided with a threaded portion (5) and a drive portion (3) for applying a driving device. The portion of the shank (2) adjacent to the drive portion (3) flares conically toward the drive portion (3). The thread (5) engages in the substructure (11), whereby the conical portion (6) is pulled into contact with the section (10) and presses it against the substructure (11). By virtue of appropriate friction, the torque is increased to an appropriate level, and so torque-dependent stopping of the driving action can be achieved.
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