Emhart Inc.

Yuji Kojyo

Yoshiteru Kondo

Yasuko Natsume

Hitoshi Kawaguchi

Hiromi Ogawa

Masaharu Imahara

Hideharu Nakagami

Hiroshi Endo

Mitsuyasu Yamada

A stud which is automatically fed so as to welded stably and properly, has a large electric contact surface with the collet, facilitates clip attachment, and maintains the engagement firmly after the attachment of the clip. A stud 1 extends upwardly into a rod-like form which is threaded on its periphery, and includes a welding tip at the lower end thereof for welding to a base member such as a panel so as to be used in mounting a member to be attached on the base member. The stud 1 is formed to be short in overall length and its welding tip is formed as a flange 4 whose diameter is larger than that of the rod-like body. A crest 6 of the screw 3 is formed flat. An upper flank angle 8 of the screw is formed large while a lower flank angle 10 of it is formed small. An edge 12 of an upper end 11 of the stud is chamfered.

Stud bolt

Growing community of inventors

Kanagawa, Japan

Yuji Kojyo