Patent Number: 8,585,339

Title: Screw member

Abstract: For certainly handling a screw member, a screw member 1 includes a male screw 2, and an inner peripheral face of the hole 4 has an engaging recessed part 5 to be engaged with an engaging projected part 11 of a tapered engaging part 10 of a rotary tool 9, and a stepped part 6, said inner peripheral face is parallel or make close to a center axis 7 of the screw member 1 from the head part 3 in a direction of the male screw and from the stepped part 6 in the direction of the male screw, and head part side end edge 8a and an end edge of the stepped part 8b to be engaged with the engaging projected part 11 have an angle of said inner peripheral face being 90.+-.5 degrees with respect to the head part 3 and the stepped part 6.

Inventors: Ishikawa; Yusuke (Tokyo, JP)

Assignee: GC Corporation

International Classification: F16B 23/00 (20060101)

Expiration Date: 1/19/12018