To prevent looseness in the inlet section of a hole by forming a plurality of projections at specified places from the intermediate section of a rod- shaped steel material to a plate.

The T-shaped metal fitting 1 for the panel is composed of a circular plate la and a rod-shaped steel material 1b vertically welded and fixed at the central section of the circular plate la, and a plurality of projections 1c are formed at specified places from the intermediate section of the rod-shaped steel material 1b to the plate 1a. The rod-shaped steel materials 1b are fitted into holes 3 bored to panel header surfaces, mounting members 2 are welded and fastened onto the top faces of the plates 1a, and decorative lattices, etc., are fixed onto the mounting members 2. Since the projections 1c fasten the rod-shaped steel materials 1b near the plates la by intruding the projections 1c around the holes 3 from the intermediate places of the holes to inlets, the looseness of the metal fittings 1 is not generated in the inlet sections of the holes 3 even when ALC panel P themselves are shaken.