| 摘要 |
PURPOSE: A coupling protecting structure for a bolt and a nut is provided to prevent the bolt from being released from the nut due to vibration or impact applied by fastening the bolt using a washer. CONSTITUTION: A plurality of slots(102) is formed in a thread section(101) of a bolt(1) along an axial direction of the bolt(1). A wedge(301) having a shape corresponding to a shape of the slots(102) is formed at an inner portion of a perforation hole of a washer(3). The wedge(301) formed in the washer(3) is inserted into the slots(102). A nut(2) is screw-coupled into a rear portion of the bolt(1). The wedge(301) is protruded from both sides of the washer(3). Alternately, the wedge(301) is protruded from one side of the washer(3).
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