| 摘要 |
<p>A wood screw includes a head (1) and a shank (2) which includes a screw-in portion (21) including a tapered section and a tip point at a distal end of the tapered section. A groove (22) is defined longitudinally in the shank (2) and starts from the tapered section and extends toward the head (1). A plurality of threads (20) are formed on an outer periphery of the shank (2) including the screw-in portion (21). A plurality of cutting teeth (210) are formed on the threads (20) on the screw-in portion (21). A plurality of ribs (23) extend spirally from an outer periphery of the shank (2) and located between the threads (20).</p> |
