this specific model is bored exclusively for a 1/2" shaft

Circuit Protection: Effectively manages inductive loads to prevent contact welding in the heater control circuit

While the coil is 24V for control circuit integration

always use 18 AWG twisted

With a maximum inlet pressure of 1/2 PSI and a factory-calibrated 5-12 inch water column outlet range

Trane TCONT103AN21HA Thermostat 320735-701 this specific model is boredThe Trane TCONT103AN21HA is a professional grade, non programmable digital thermostat engineered for precise 2 stage heating and 1 stage cooling applications. As a veteran HVAC technician, I recommend this unit for its reliability in systems utilizing heat pump technology, gas, oil, or electric furnaces. This model is the direct OEM replacement for legacy controls including the TCONT401AN21MA, TCONT401AN21MAA, XR401, and ACONT401AN21MA. It features a