| 摘要 |
PROBLEM TO BE SOLVED: To prevent the stay of an air in a metal fitting when a nut fixing metal fitting for obstructing the rotating together of a nut and bolt is covered by a concrete. SOLUTION: A nut fixing metal fitting 1 is provided with a plate 2 and a cap 3 fixed to the plate 2 and the cap 3 is provided with a nut storage 5 formed in a nearly similar figure to the outer shape of a nut 14 and also a through hole 8 is provided on the top surface and when a concrete is invaded in the cap 3 from the top surface through hole 8 of the cap 3, an air remove passage 9 for removing the inside air to the outside is formed between this cap 3 and plate 2.
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