VIBRATION PROOF FASTENER

PROBLEM TO BE SOLVED: To provide a vibration proof fastener capable of securely preventing its rotation since vibration caused by the operation of equipment is absorbed and attenuated by a damping body, an energization force by the damping body occurs in the relation thereof with a tightened member, and particularly the freedom degree of the damping body fittedly inserted into a recessed part at the seat face of the fastener is restricted by the recessed part and, therefore, the damping body is not deformed by vibration and stable energization force is supplied to the tightened member at all times and maintained, and the fastener resists the rotation thereof in the loosening direction due to vibration, and also capable of extremely increasing workability and handleability since parts such as washers are not required in the tightening and mounting operations. SOLUTION: This fastener 1 is used for tightening members to each other or tightening the members. The recessed part 2b is formed in the seat face 2a thereof, and the damping body 3 is inserted and fitted in the recessed part. COPYRIGHT: (C)2005,JPO&NCIPI