How tight should the nut on the end of the thermocouple be when secured?

The appropriate tightness for the nut on the end of the thermocouple should be hand tight with an additional quarter turn. This ensures that the thermocouple is secured without being over-tightened, which could potentially damage the device or create a leak in the gas line.

By applying this method of tightening, you maintain a good seal at the connection point, allowing for accurate temperature readings while preventing any voids or gaps that could affect performance. Moreover, over-tightening can lead to the deformation of the thermocouple or stress fractures, ultimately shortening the lifespan of the component. The specified approach strikes a balance between security and the integrity of the thermocouple, enabling it to function correctly within commercial food equipment systems.