| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an epoch-making male screw having an extremely high commercial value.SOLUTION: In a male screw 1 for being screwed into a female screw 20, a bottomed small female screw 2 is provided in the lengthwise direction of the shaft center of the male screw 1, and a slave male screw 10 is screwed into the small female screw 2. The male screw 1 is provided with a slit 3 which is orthogonal to the shaft center direction, which is set deep enough to reach the small female screw 2 and which has a predetermined peripheral length. In the small female screw 2 and the slave male screw 10, a part from the bottom of the small female screw 2 to the slit 3 is configured as a non-screwing part.</p> |
