Title:
TIGHTENING STRUCTURE OF POWDER COATED NUT
Document Type and Number:
Japanese Patent JP2003206919
Kind Code:
A
Abstract:
To provide a tightening structure by a bolt and a nut capable of preventing powder coating from peeling off.
In this structure for tightening an object to be tightened by screw-fitting the bag-like nut coated with powder in the bolt 11, a plastic ring 15 having self-lubricity is provided between the bag-like nut 14 and the object to be tightened. Consequently, slide of a powder coated face of the nut 14 is improved, and it is possible for even a tightening torque of about 30 to 35 N.m to reach actual use strength in the case of a pipe joint of a water pipe. Moreover, there is an advantage that unevenness of its tightening torque is small.
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| JPH10148283 | PIPE JOINT STRUCTURE |
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Inventors:
KAWANISHI HIDETO
Application Number:
JP2002004546A
Publication Date:
July 25, 2003
Filing Date:
January 11, 2002
Export Citation:
Assignee:
KAWANISHI SUIDO KIKI KK
International Classes:
F16L58/02; F16B31/02; F16B37/14; (IPC1-7): F16B31/02; F16B37/14; F16L58/02
Attorney, Agent or Firm:
Toshihiko Uchida