| 摘要 |
The invention relates to a screw, comprising a shaft (2) and a head, said head being provided with a means (6) of engaging a tool. The shaft has a thread (4) and is provided with a boring part (5) at its free end. The height (LK) of the screw (1) head (3) measured in the direction of the screw axis is smaller than the lead (S) of the thread (4) formed on the shaft (2). A means (6) for engaging an external tool is configured on the head (3).
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