Frishauf, Holtz, Goodman & Chick, P.C.
Bolt and nut
A bolt is provided with a head part and a shank part. The shank part includes a first constant diameter cylindrical part, a transition part, a cylindrical connection part, and a second constant diameter cylindrical part concentrically extending from the first constant diameter cylindrical part to the second constant diameter cylindrical part. The first constant diameter cylindrical part has a screw thread with a predetermined pitch formed on the side surface thereof. The transition part has a tapered shape and has a screw thread with a predetermined pitch formed on the side surface thereof. The cylindrical connection part has a diameter smaller than that of the first constant diameter part. The second constant diameter cylindrical part has a diameter smaller than the first constant diameter part, and has a screw thread with a predetermined pitch formed on the side surface thereof. The crest part of the screw thread formed on the side surface of the transition part is truncated.
Aoyama Seisakusho Co., Ltd.
F F
F16B F16B
inventional inventional
Mitsuru Kazuhiro Masahiko Hiromichi Tetsuya
Kozawa Aoyama Hamada Mizuno Osawa