Abstract: A plurality of contacts are stamped out of flat sheet metal stock simultaneously with blank forming female rectangular contact boxes initially flat, with a male contact extending therefrom, and with each box material blank joined to a common carrier strip extending longitudinally of the contact array. The flat box material blanks are initially equal to or slightly less than a fraction of the distance D between uniformly spaced holes within the holder. While maintaining the contacts linked to the carrier strip, the lateral side edges of the box material blanks are bent up and swaged to thin the box material portions and laterally expand those portions, widthwise, in excess of D.