METAL PLATE WITH TAPPED HOLE, FRAME, AND METHOD FOR MANUFACTURING METAL PLATE WITH TAPPED HOLE.

摘要

In the metal plate with a tapped hole, the tapped hole is provided with a cylindrical outer wall section that rises from one surface of the metal plate and a cylindrical inner wall section, which is folded back from the edge of the outer wall section on the inside of the outer wall section. A female screw is formed on the inner circumferential surface of the inner wall section.