摘要 |
PROBLEM TO BE SOLVED: To provide a machine screw tightening plug causing little bending, thereby being roughly straight to be simply and easily inserted into a long prepared hole, and capable of coping with the case for using a long screw when the prepared hole bored in concrete for obtaining tightening strength. SOLUTION: Plural plug bodies 13 of synthetic resin having a cylindrical cross section to be axially long, and having an eccentric inner hole 12 are continuously provided in an axial direction through disconnected parts 15 of cuts 14 crossing the axial direction to form this tightening plug 11. Generation of bending in the tightening plug 11 after molding is thus reduced.
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