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Old 05-31-2014, 08:38 PM   #7
Growley bear
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Join Date: Apr 2012
Posts: 777
Default Re: Painting the Car, Sequence of Events

Chasing threads on original fasteners is not recommended as they were rolled thus no metal was removed. The threads are generally a touch larger in diameter than the unthreaded shank. Cut threads w/taps and dies remove metal thus not a very precise fit of threads. The threads are generally a touch smaller than the unthreaded shank. Thread files and bench mounted wire brushes work well at dressing up threads on bolts.

Chet
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