| 摘要 |
PROBLEM TO BE SOLVED: To provide a nut having proper and stable axial force and stable centering function. SOLUTION: When the nut 10 having a female screw on the inner peripheral face is deformed at the front end to the inside, the female screw gives stress concentration to a male screw 21 of the bolt 20. So, the female screw 12 is formed only in a region excluding such a range. COPYRIGHT: (C)2005,JPO&NCIPI
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