| 摘要 |
A thread joint to be subjected to the fluctuating load having a thread to be subjected to the tensile load from which a thread crest contact surface is cut off from the threads thereof in the direction of the tensile load, and the contact height of the same is lowered with respect to the other portion. Therefore, the maximum bending moment per unit area generated at the root of the threads is uniformed and the peak bending moment per unit area is reduced. |
