Title:
SCREW WITH CENTERING HOLE, WRENCH WITH CENTERING PIN, ATTACHMENT WITH CENTERING PIN AND DRIVER WITH CENTERING PIN
Document Type and Number:
Japanese Patent JP2019196808
Kind Code:
A
Abstract:
To provide a screw with a centering hole, a wrench with a centering pin, an attachment with a centering pin and a driver with a centering pin which are compatible with the conventional screw and, although having the same strength, hardly causes slipping when using a specified wrench.SOLUTION: A screw with a centering hole includes a male screw part 2 formed of a spiral thread, a rotation force activation groove 4 which is integrally formed on a center of a base end part 2B of the male screw part 2 and transmits a rotation force to the male screw part 2, and a centering hole 5 formed on a bottom part center of the rotation force activation groove 4.SELECTED DRAWING: Figure 2
Inventors:
ISOYAMA SANAE
Application Number:
JP2018091363A
Publication Date:
November 14, 2019
Filing Date:
May 10, 2018
Export Citation:
Assignee:
KONII KEN CO LTD
International Classes:
F16B23/00; B25B13/54; B25B15/00
Domestic Patent References:
| JP2000257615A | 2000-09-19 | |||
| JP2010084931A | 2010-04-15 | |||
| JP2014046819A | 2014-03-17 | |||
| JPS4729799U | 1972-12-05 | |||
| JPS52105660U | 1977-08-11 |
Attorney, Agent or Firm:
Hideo Fujimoto
Eiji Fujimoto
Nishimura Kojo
Eiji Fujimoto
Nishimura Kojo