A turn signal switch assembly is constructed having a switch stalk and junction box rotatably coupled using a shoulder bolt. The shoulder bolt has a shoulder area useful for allowing the switch stalk to rotate freely relative to the junction box. The threaded end of the shoulder bolt is turned and tightened into at least one corresponding threaded aperture in the junction box, thereby mechanically coupling the switch stalk to the junction box. The threaded end of the shoulder bolt also extends past a surface of the junction box so that the threaded end is exposed. The threaded end is mechanically transformed by an orbital riveting device so as to act as a positive locking feature. The shoulder bolt thereafter secures the switch stalk to the junction box using the mechanical advantages of a threaded connection in combination with the positive locking feature of a riveted connection.