The APEM Inc. part 8642AB is a push button switch with a round plunger design. It is a Double Pole Double Throw (DPDT) switch that is capable of handling 6A at 250VAC and 30VDC. This momentary contact switch is designed for panel mounting and features solder lug terminals for easy installation. It is ideal for applications where temporary switching actions are required, such as industrial control panels, machinery, and automotive systems.