MICRO SWITCH™ Premium Large Basic Switches: BZ Series, Single Pole Double Throw (SPDT), Split Contact Construction Allowing Two Isolated Circuits, 5 A 250 Vac, 11,9 mm [0.470 in] Threaded Bushing with 8,3 mm [0.326 in] Diameter Hardened Steel Additional Overtravel Plunger, Highest Operating Force in BZ Series, Binding Head Combination Screw Termination with Integral Lock Washers, Mounting Holes will Accept Pins or Screws, Bushing Hardware Furnished Unassembled UL, CSA