Single pole single throw (SPST) contact configuration ON-NONE-OFF (ON-OFF) switch type 20.8 mm panel cutout width 20.6 mm panel cutout height 20 mm panel cutout diameter 5 A contact current Black actuator color Panel mount mounting type Quick connect terminal type ON (symbol); OFF (symbol) legend 20.6 x 20.8 mm panel cutout size Nylon enclosure material RS Pro 20 mm round push button switch. A miniature range of non-illuminated round push button switches designed for panel mounting. Momentary or latching action, round push button switches are suitable for a wide range of applications. Installation is simple: once a 20 mm diameter cutout has been made, the push button switches simply push into the panel or device and are held securely. Round push button switches certified for mains use are available with a black or white body and can be configured as single pole or double pole, to suit the requirements of each project. The general-purpose top is perfect for maintenance, repair and new construction.