Clamping device, has screw head fixed on small cylindrical hole by screwing tool, flat shoulder fixed in surface of screw head and connected with back side of screw head, where hole is formed in area formed above screw

摘要

The device has a screw screwed in a head clamp, and a screw head (1) fixed on a small cylindrical hole by a screwing tool, where the small cylindrical hole is formed in an area (2) formed above the screw. A flat shoulder is fixed in a surface of the screw head, and is connected with a back side of the screw head. The screw head is fixed with a gripping head (5) that is designed in square shape. A screw body is loosened with a right tool after fixing the screw head in the small cylindrical hole.