| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonskid tool for preventing the fracture of a shaft part and the damage of a male screw part while preventing the damage of green and the floor surface of a structure, etc., and improving a wearing feeling, generating a loosening preventing effect while relatively smoothly performing screwing work and making footwear light in weight. SOLUTION: On the upper end part of a columnar body 12 made of hard nylon resin, a side part expanded part 12a expanded in a cross shape is provided. The side part expanded part 12a is molded and fixed so as to be covered with polyurethane resin and a nonskid part 14 is formed. Then, the male screw part 16a is provided on an outer peripheral part over the entire length of the shaft part 16 projected downwards from the nonskid part 14 in the columnar body 12. Then, a loosening preventing part 18 is provided by filling the depth of 1/2 of a dent bottom side fully in the width direction of a dent over the center angle of about 15 degrees at the same position in a peripheral direction in respective two rotations from a base part among the spirals of the dent part 16a1 of the male screw part 16a.
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