For 5/8-inch shafts

The Honeywell 43191680-105 is rated for 24 VAC applications and features fully adjustable switching points across the entire length of the actuator's stroke

While the physical 3/8" sweat connection may fit

Automatic Reset Logic: The 100 PSI differential allows for system stabilization before the 325 PSIG cut-in

ensuring continuous operational uptime for the Marley Engineered Products heater units it supports

Carrier HH19ZA145 Limit Switch 321702-401 For 5/8-inch shaftsThe Carrier HH19ZA145 Limit Switch is a critical safety component designed for precise thermal monitoring in HVAC furnace systems and packaged units. As a high performance OEM replacement limit switch, this disc style sensor features a normally closed circuit that provides essential protection against heat exchanger overheating. Engineered to open at 145F and close at 105F, this automatic reset limit switch ensures your heating equipment stays within