A higher voltage rating is a suitable upgrade

System Integrity: Restores the metal-to-metal or soft-seated seal integrity required for accurate hydronic heating control

As a veteran-preferred HVAC replacement fan blade

018" diameter aperture

provided the stem is not excessively pitted

White-Rodgers 90-291Q Fan Relay A higher voltage rating isThe White Rodgers 90 291Q is a technical grade HVAC fan relay designed for switching single or two speed fan motors, solenoids, and resistive loads in commercial and residential systems. As a Type 84 enclosed relay, it features a Single Pole Normally Open (SPNO) configuration, making it a standard choice for 120V fan relay replacements where reliability is non negotiable. The 120V AC coil operates at a nominal 25 mA with a DC resistance of 2,000 Ohms,