Re: 7/16-14 thread chaser
Most threads in the parts we are talking about (flathead Ford engines) are "standard" class 2 threads as used in assembly line production.This is normally a 77% thread. A class 2 tap will not remove metal from a class 2 threaded hole unless the the female thread is damaged.
Myths get started by very intelligent people "creatively" answering a question rather than spending the time to look up the correct answer. Once a myth gets started, it is hard to dispell.
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