This screw has a 1 inch set of screws followed by 2 inches of smooth to the screw head. The screw twists through the rotor cap so it doesn't get separated from the cap.
I am a bit squeamish about putting copper or aluminum strips in the head and then trying to force the screw into the left over space.
I cannot bore it out to the next size because then I would also have to bore out the rotor cap. Besides, not having room to work with a drill at a 90 degree angle.
The car has 180K actual miles, so I guess this is its 3rd cap and rotor. The second rotor didn't get damaged, and the car still runs...
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Keeping it running is better than buying new
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