Description
The Fenwal 01-990040-000 Locking part secures the adjustment sleeve on compatible temperature control components after calibration, supporting the maintenance of accurate control settings during equipment operation. It attaches directly to Thermoswitch controllers and related assemblies to reduce the possibility of setting changes caused by vibration. Generally applied in commercial and industrial HVAC systems, heating equipment, and temperature monitoring applications, the part supports stable thermal regulation within control circuits. Its compact configuration allows integration into existing control assemblies while supporting preserved calibration consistency and dependable system operation over extended periods.
