Honeywell JV-30 MICRO SWITCH™ Miniature Basic Switches: V Series Auxiliary Actuator, 20,5 mm [0.81 in] Hinged One-Way Roller Leaf Actuator with 4,8 mm [0.19 in] Diameter Oil Bronze Roller, 510 g [18.0 oz] Maximum Operating Force, Mounting Hardware Includes: (2) 4-40 UNC