Safety Interlock Switch, 90 Degrees Key, Front and Top Opening, Contact Form 1NO/1NC, Break Before Make, Slow Action, Actuator Length 1.96 in, Connection Type 1/2 in NPT Conduit, AC Contact Rating 1mA to 10A @ 600V, Series GK, DC Contact Rating 1mA to 10A @ 250V, Height 4.79 in, Width 1.65 in, Depth 1.68 in, NEMA Rating 1, 12, 13, 4, IP Rating 67, Operating Temp. Range -13 Degrees to 185 Degrees F, Contact Material Silver, Conduit Size 1/2 in NPT, Body Material Zinc Die-Cast