| 摘要 |
A nut is inserted into a hollow portion inside a structural object (for example, a C-shaped steel) in a state wherein the nut is held in a tilted state which is passable through an opening portion of the structural object (for example, the C-shaped steel). By inserting a male screw portion (for example, a bolt) from an open portion side of a base portion through the opening portion of the structural object (for example, the C-shaped steel), the nut sways in parallel to the opening portion, and a female screw portion faces the opening portion. By a screw-in operation of the male screw portion (for example, the bolt), the male screw portion (for example, the bolt) and the female screw portion screw together, thereby fixing a mating member (for example, a solar cell module).
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