this is the bracket leg itself

as a service kit

red oil provides a more distinct meniscus for better legibility and prevents evaporation issues common with water-filled gauges

and a CW (clockwise) rotation as viewed from the shaft end

If the existing socket is charred or damaged

Resideo T104C1036 Actuator 323055-751 this is the bracket legThe Resideo T104C1036 Actuator is a professional grade high capacity thermostatic radiator actuator designed for the precise automation of two pipe steam or hot water systems. This non electric radiator control eliminates the need for external power or wiring, utilizing a robust thermostatic element to modulate flow through radiators, convectors, and baseboard units. Specifically engineered for North American heating applications, the T104C1036