MICRO SWITCH™ Premium Large Basic Switches: YA Series, Single Pole Normally Open (SPNO), 20 A 125/250/480 Vac, ENEC 20 A 250 Vac, 11,9 mm [0.470 in] Threaded Bushing with 8,3 mm [0.326 in] Diameter Hardened Steel Additional Overtravel Plunger, Binding Head Screw Termination with Cup Washers, Bushing Hardware Furnished Unassembled, Mounting Holes will Accept Pins or Screws, UL, CE, CSA, ENEC