| 摘要 |
<p>A nut 12 serving as a fastening member includes a screw part 14 which is screwed to a joint body 11 and connects a pipe 10, and a holding part 15 which is held by a fastening tool when screwing the nut 12. The screw part 14 and the holding part 15 are coupled to each other before the screwing of the nut 12 to the joint body 11. When screwing the nut 12 to the joint body 11, the coupling of the holding part 15 and the screw part 14 is cancelled when the rotational torque of the holding part 15 reaches a predetermined value which is larger than the rotational torque at the time of completing the connection of the pipe 10, that is, after the connection of the pipe 10 is completed.</p> |
