PURPOSE: To easily decide a rotation angle to a body-to-be-combined and also improve drawing strength, by providing axis direction protruded threads, extending in an axis direction on the outer periphery of an axis part, and spiral protruded threads, having height lower than the axis direction protruded threads.

CONSTITUTION: A fastener 1 is integrally provided with an axis part 2 and a head part 3, and axis direction protruded threads 4, extending linearly in the axis direction, and spiral protruded threads 5, having low height, are provided by appropriate number respectively on the outer periphery of the axis part 2. When the fastener 1 is pushed in a lower hole, rotation is prevented by the axis direction protruded thread 4, consequently easily can be set at a given rotation angle. The intrusion of the fastener 1 into a body-to-be- combined flows material in a space surrounded by the axis direction protruded threads 4 and the spiral threads 5. Consequently, when drawing direction force is applied, since material of the body-to-be-combined, intruded in the space, is compressed by the cross parts, having an acute angler, between the axis direction protruded threads 4 and the spiral protruded threads 5, to generate strong resistant force by the material, extremely increasing drawing strength.