METHOD OF PARALLEL FIXATION OF PLURALITY OF SCREWS TO METALLIC PLATE

摘要

At least one screw means provided with an angular stepped neck by certain distance from the bearing surface of a screw head thereof is fastened firmly onto a metal plate having at least one opening of a shape corresponding to that of the stepped neck through the opening at the surface of a receiving means having at least one hole bored therethrough to insert a screw body of the screw means thereinto by pressing the stepped neck and the receiving means against each other to cause the stepped neck and the opening to be deformed plastically so that the metal plate is tightly clamped between the deformed stepped neck and the screw head to form the fastened assembly of the metal plate and the screw means.