Title:
CYLINDRICAL NUT
Document Type and Number:
Japanese Patent JP3516859
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To sufficiently display the function of a spring washer strengthening the fastening of a nut and a bolt by providing a level in difference in a cylindrical part in the nut constituted of a nut part and the cylindrical part connected with this nut part.
SOLUTION: This cylindrical nut 1 is constituted of a nut part 2 and a cylindrical part 3 which is provided successively with the nut part 2. The cylindrical part 3 is constituted of a large diameter part 3a and a small diameter part 3b, the large diameter part 3a and the small diameter part 3b are provided to be located on the side of the nut part 2 and on the side of the insertion of a bolt, respectively, and a difference in level 6 is formed at the boundary of the large diameter part 3a and the small diameter part 3b. A female screw 4 is provided on a bolt inserting hole 7 passing through the nut part 2 and the cylindrical part 3. A flange 5 is provided on the connecting part of the nut part 2 and the cylindrical part 3. As a result, the locking of a spring washer can be easily performed, the possibility of crushing the spring washer due to overfastening of the bolt and the nut is eliminated, repulsion of the spring washer can be maintained and the fastening of the bolt and the nut can be prevented from loosening.
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Inventors:
Kanai, Hiroki
Application Number:
JP6058698A
Publication Date:
April 05, 2004
Filing Date:
February 25, 1998
Export Citation:
Assignee:
Kanai, Hiroki
International Classes:
F16B37/00; F16B31/02; F16B39/26; (IPC1-7): F16B31/02; F16B37/00; F16B39/26
Attorney, Agent or Firm:
細井 勇
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