These are designed for a friction-fit or use an internal retaining wire

While designed as a genuine Trane part

Broad Compatibility: Validated for use in Bard Q-Series and WA/WL Series wall-mount units typical in telecom and educational facilities

Reliable Calibration: Features factory-set thermal limits for precise and consistent equipment protection

Belimo EFB24-MFT-S Actuator 322838-752 These are designed for aThe Belimo EFB24 MFT S Actuator is a high torque spring return actuator designed for the fail safe operation of large dampers and valves in demanding HVACR applications. Delivering 270 in lb of torque, this unit utilizes Multi Function Technology (MFT) to provide versatile control options, including proportional control, floating point, and on off configurations. It supports 24V AC DC power inputs and features a built in auxiliary switch for position