MICRO SWITCH™ Premium Large Basic Switches: BA and BE Series Accessory, Panel Mount Mounting Bracket, 12,7 mm [0.50 in] Threaded Bushing with 7,9 mm [0.31 in] Diameter Additional Overtravel Plunger Actuator, Bushing Hardware Includes: (1) C Ring, (1) Elastomer Seal, (1) Seal Ring, (1) Lock Washer, For Use with Pin Plunger BA and BE Series Basic Switches, Hardware Furnished Unassembled