| 摘要 |
<p>The screw (1) has a shaft (3) adjacent to a screw head (2) and including a threaded section (4) over an entire length of the shaft, where a radial diameter of the screw head is larger than a radial diameter of the shaft. A drill bit (10) is provided at a screw head distant end of the shaft. The threaded section includes a thread for screwing a screw nut (6) as a lock nut on the threaded section. An outer diameter value of the drill bit lies between inner and outer diameter values of the thread. An inner diameter value of the screw nut is larger than the outer diameter value of the drill bit.</p> |
