What is the small piece of metal that comes with the temperature sensors used for?

What is the small piece of metal that comes with the temperature sensors used for?

This small piece of metal is a dowel pin. It is used to fill in the extra space in the thermistor slot on the hot block. Since the thermistor is shorter than the slot, the dowel pin is used to fill in this extra space and keep the thermistor in place.

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