| 摘要 |
PURPOSE: A lock nut is provided to rotate and release a lock nut since the front end of the coil spring is pushed and moved back by multiple coupling holes and the inner diameter is enlarged, thereby lowering coherence between the coil spring and the screw part of a bolt. CONSTITUTION: A lock nut comprises a nut body(10) and a coil spring(20). A coupling hole(11) into which a screw part(1a) of a bolt(1) is inserted passes through the front and rear sides of the nut body. The coil spring is inserted and installed inside the coupling hole of the nut body. The rear end(21) of the coil spring is formed on a fixed groove(13) formed on the rear side of the nut body. The nut body is combined with the screw part(11a) of the bolt. The coil spring is coupled and fixed with the screw part to prevent the rotation of the nut body.
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