Re: Over tightened screws?
In the early days of military mechanization the Driver/Mechaninc had a list of checks to perform before first use every day. Among "oil level", "water level" etc. was "check tightness of cylinder head bolts". This was easily accomplished with a spanner and applying a quarter turn on each bolt. Result: many head bolts shearing.
Of course the PHB was always helpful. During an inspection the inspecting officer asked a driver/mechanic "Is it pinking?"
On receiving the reply "No."
PHB says "Well, get it pinking right away!"
Hands up those who think Scott Adams makes it all up.