Quote:
Originally posted by DodgeViper
I can only say is I have been tapping holes for over 30 years and not once have I ever ran a tapper thread tap all the way to the end.
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Perhaps there is a need for a definition for "tapped to the end". When the widest part of the tap reaches the top surface of the polycarbonate. This is a special situation, not to be treated as a metal to metal contact situation as in common plumbing. Reread the simple procedure I described and you may yet see the merits of doing this.