Title:
SCREW
Document Type and Number:
Japanese Patent JP2015001231
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a screw capable of performing a fastening operation easily.SOLUTION: A projection 5 is formed in a hole formed in the upper face of the head 3 of a bolt 1. When a hexagonal bar spanner is inserted into a hole 4, therefore, the hexagonal bar spanner is clamped on the inner wall face of the hole 4 while crushing the protrusion 5 in the hole 4 so that the bolt 1 can be prevented from coming out from the hexagonal bar spanner. As a result, it is possible to perform the fastening operation of the bolt 1 easily.
Inventors:
UTSUMI KEIYA
Application Number:
JP2013124384A
Publication Date:
January 05, 2015
Filing Date:
June 13, 2013
Export Citation:
Assignee:
AZBIL CORP
International Classes:
F16B41/00; F16B23/00
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Shigeki Yamakawa