Title:
WASHER
Document Type and Number:
Japanese Patent JP2003202010
Kind Code:
A
Abstract:
To easily, certainly and visually confirm fastening force of a bolt.
This washer 1 is interposed on the load seat surface side at the time of fastening two members 4 on each other with the bolt 3. An outer peripheral part 11 of this washer 1 is made at an upward gradient of 5-10 degrees toward a center, and an inner peripheral part is formed in a projected state having height t2 which is 1.5-2.5 times the thickness of the washer. Consequently, no special tool is required at the time of fastening the bolt, and a fastening end point of the bolt is easily and precisely judged only visually, and the stable fastening force is acquired.
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Inventors:
TAJIRI KAZUO
YADOGUCHI TETSUYA
TOYA MASAYUKI
TAKASUGI TOSHIHIRO
YADOGUCHI TETSUYA
TOYA MASAYUKI
TAKASUGI TOSHIHIRO
Application Number:
JP2002321433A
Publication Date:
July 18, 2003
Filing Date:
November 05, 2002
Export Citation:
Assignee:
SUMITOMO METALS KOKURA LTD
International Classes:
F16B31/02; F16B39/24; F16B43/00; (IPC1-7): F16B31/02; F16B39/24; F16B43/00
Attorney, Agent or Firm:
Mizogami Miyoshi (2 outside)
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