DOUBLE FASTENING APPARATUS AND METHOD

摘要

The present invention relates to a double fastening apparatus. The double fastening apparatus comprises: a first nut unit where a bolt is coupled to a first thread formed on an inner surface of a hollow portion; and a second nut unit coupled to a second thread formed on an outer surface of the first nut unit to increase a fastening force between the first nut unit and the bolt. To solve the problems described above, the purpose of the present invention is to provide a double fastening method, and the double fastening apparatus reinforcing the fastening force between the bolt and the nut.