| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive loosening prevention screw exhibiting a function of surely preventing loosening of a nut with a simple structure, and having excellent workability.SOLUTION: A fixed member 16 is fixed with a male screw 12 and a female screw 20. A thread 18 of at least one of the male screw 12 and female screw 20 is formed into a corrugated shape along the spiral winding of the screw, and a lead angle α periodically changes. The male screw 12 of a bolt 10 is formed into a corrugated shape, and screwed into a normal nut 14 to fix the fixed member 16. The corrugated thread 18 has a plurality of wave numbers, such as a wave number of 3 or 4, around the screw. |
