Up: Mom On, Center: Off. Two screw terminals. This universal In the switches context, UNIVERSAL equates to multi-purpose, rather than some of our specialized switches which are generally used for one purpose. switch can also be used to control day signaling lamps. Diecast housing. For stem- or bracket-mounting. 15/32" -32 thread mounting stem, with keyway In toggle switches, a groove cut across the threads of the mounting stem. Toggle switches are generally mounted through a circular hole in the panel, and secured by tightening a nut against the panel. Sometimes the nut can loosen ciusing rotation of the switch. Some panels are pre-cut with holes that have a small projection which engages with the keyway, thus preventing potential switch rotation.. Brackets: .170" (4.3mm) diameter holes, 1.72" (43.7mm) on centers. Fits panels up to 3/16" (4.8mm) thick. Chrome plated brass handle, 1 1/16" long (27.0mm). Steel screw terminals. Plated steel hex nut. 30A at 6-12V DC, 15A at 24-36V DC. Silver-plated contacts pair of devices that touch or come apart at the point where the switch throw makes or breaks the circuit. Silver contacts are common because of their low conductivity and low electrical resistance. Many Cole Hersee switches have silver contacts..