| 摘要 |
<p>Disclosed are a stepped screw having a washer coupled thereto and a method and apparatus for manufacturing same. The stepped screw having a washer coupled thereto according to one aspect of the present invention comprises: a stepped screw having a head part, a stepped part, the diameter of which is smaller than that of the head part, and a threaded part, the diameter of which is smaller than that of the stepped part and which has a thread along the circumference thereof; and a washer fitted to the stepped part. The stepped part has a stopper formed on the circumference of the stepped part by deforming the stepped part, wherein said stopper protrudes outwardly so as to prevent the washer from escaping from the stepped part.</p> |
