Aoyama Seisakusho Co., Ltd.

Satoshi Iida

Yukinori Fujimoto

Kazuhiro Koga

Satoshi Konagaya

Sadayoshi Hasegawa

Kenya Yamada

Kazuoki Shibuya

Naoki Inaba

Yuki Nishimura

The bolt of the present invention can reliably peel coating even when fastened with a low torque, and can secure sufficient conductivity. A coating peeling part for peeling coating is formed at a tip end of an axis part in which a regular screw part is formed. The coating peeling part includes crushing parts having a trapezoidal top part and having a flank which is projected at a different angle with respect to the flank of the regular screw part; and a protruding part which is arranged adjacent to the crushing parts and whose top part projects beyond the outer diameter of the regular screw part.

Bolt

Provided is a nut into which a bolt () including a male-threaded portion with a male-threaded external diameter d and a male-threaded core diameter dis screwed, wherein a bolt insertion side end of a female-threaded portion () formed in a nut body () is provided with an incompletely threaded female portion () that is formed by one to three pitches so that an internal diameter dimension D is larger than (d+d)/2 and is smaller than the male-threaded external diameter d. Accordingly, even when the bolt is screwed into the nut in the inclination direction, the bolt may be rotated about a contact surface with respect to the incompletely threaded female portion (), and hence seizing may be prevented.

Anti-seizing nut

Growing community of inventors

Niwa-gun, Japan

Satoshi Iida