| 摘要 |
PROBLEM TO BE SOLVED: To provide a wood screw capable of reducing screwing torque while preventing the formation of a crack in a wood part when screwed. SOLUTION: In this wood screw 1 with a head 3 formed at the base end and with a thread part formed at the tip, a tip part 2 of the thread part is formed into a spoon shape, and an opening of a thread groove 4a is connected to the base end of a face 2A corresponding to a spoon-shaped rake face so that the thread groove 4a of the wood screw is opened to the face 2A corresponding to the rake face. |
