BOLT

摘要

PROBLEM TO BE SOLVED: To provide a bolt capable of more surely removing a paint film and obtaining more stable current carrying performance by preventing an increase of screwing torque to be excellent in reliability. SOLUTION: A plurality of protruded parts are partially provided relating to a peripheral direction in a region from a tapered screw part over to partly a parallel screw part. A screw 31a is constituted by overlapping with each other a thread ridge of angle of threadαwith a center line T1 vertical to an axial line of the screw serving as the center and a thread ridge of angle of threadβ(β<α) with a center line T2 in a position deviated to a head part side (pressure side) from the center line T1 serving as the center.