Burr & Brown
Tapping screw
A tapping screw fastened to a subject member in which a thread portion formed in a shaft portion of the tapping screw is used to form a female screw thread in a prepared hole of the subject member. An angle of a thread ridge is approximately 30 degrees, a plurality of notches are formed in a top portion of the thread portion over a predetermined range of an entire length of the shaft portion, and a joint portion for connecting the top portion and a bottom portion of the thread portion is formed to have a circular arc shape in an area having a smaller diameter than a diameter of the prepared hole of the subject matter, as viewed in a cross section including a shaft center of the tapping screw.
Aoyama Seisakusho Co., Ltd.
F F F
F16B F16B F16B
inventional inventional inventional
Hiromichi Mitsuru Kenya
Mizuno Kozawa Yamada