SCREW AND STRUCTURE INCLUDING THE SAME

PROBLEM TO BE SOLVED: To provide a screw capable of exhibiting a high looseness prevention effect and facilitating work for screwing.SOLUTION: A screw has a shaft part extending from a first end as a screw tip part to a second end along a central axis, according to one embodiment. The shaft part includes: a first region having a first thread with a first pitch; a second region positioned on the first end side with respect to the first region, and having a second thread with a second pitch different from the first pitch; and a third region positioned on the second end side with respect to the first region, and having a third tread with the second pitch. On a cross section along the central axis, a wall thickness of the third thread is made thinner than a wall thickness of the second thread in a direction along the central axis.SELECTED DRAWING: Figure 1 【課題】高い緩み止め効果を発揮しつつネジ止めの作業が容易なネジが求められていた。【解決手段】一態様のネジは、ネジ先端部である第１端から中心軸に沿って第２端に延びる軸部を有し、該軸部は、第１ピッチの第１ネジ山を有する第１領域と、第１領域よりも第１端の側に位置して、第１ピッチと異なる第２ピッチの第２ネジ山を有する第２領域と、第１領域よりも第２端の側に位置して、第２ピッチの第３ネジ山を有する第３領域とを備えている。そして、中心軸に沿った断面において、中心軸に沿った方向での第３ネジ山の肉厚が第２ネジ山の肉厚よりも薄い。【選択図】図１