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I have to screw in the tabs from an air conditioner into a metal window frame. This probably doesnt seem hard to most people, but I am not a hany person. How would i go about doing this without killing myself?

We know that metal expands when heated, so what will happen if you cut a hole the size of a quarter in the center of a cookie sheet, then pop it in the oven until it’s very hot? Will a quarter still fit in the hole? Will the hole be bigger or small and why?
Thanks!

There is a narrow co-axial hole drilled in metal cyliner.
Will the hole shrink or expand if hot water is made to flow through the hole, and laterar surface of the cylinder is kept at constant room temperature.