4021.4722 is a part number for the Marquardt 2862-14 series, 14 mm DC miniature rotary switch. This switch is a 3-position rotary switch, with silver contacts and a black knob, with a maximum voltage of 200VAC/15VDC, and a rated current of 2A. It is suitable for use in a wide range of industrial, automotive, audio/visual, and marine applications.