| 摘要 |
<p>A bolt with a nut for single side tightening is provided to have a safety function by recognizing entire tightening with the naked eye since the outer part of a washer is separated from the inner part when more than predetermined tightening force is applied. A bolt with a nut for single side tightening includes a bolt(2), a washer(4), and a nut(6). The bolt has a coupling part(2b), a body part(2d), and a head part(2c) inside a spiral part(2a) sequentially. The washer is coupled to the coupling part of the bolt through a coupling hole(4a) not to be rotatable and has a coupling surface(4b) at an outer surface thereof. The nut is screwed to the spiral part of the bolt. The washer with the coupling hole in a shape corresponding to the coupling part of the bolt formed in a polygon type or an uneven type is coupled to the coupling part of the bolt.</p> |
