| 摘要 |
<p>A wood screw (300) includes a head (310), a shank (320), an engagement thread, at least one parallel thread and at least one guiding thread. The head is for receiving a fastening tool. The shank extends from the head and includes a parallel shank portion (324), a tapered portion (322) formed at the tip of the parallel shank portion and a pointed end (326) formed at the tip of the tapered portion. The engagement thread (330) is formed on the parallel shank portion. The at least one parallel thread (340) is formed on the tapered portion. Then at least one guiding thread (450) is formed on the tapered portion and between the parallel thread and the engagement thread.
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