Thread: tap drill size
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Martin Riddle Martin Riddle is offline
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Default tap drill size



"Jim Thompson" wrote in
message ...
1/4"-20 tap calls for 0.201" tap drill (13/64")

Into a steel 1/8" panel, tap is hard enough to turn that handles flex
:-(

Is that normal, or do I need to go up one or more drill sizes?

...Jim Thompson
--



You need some cutting oil, Kerosene or plain oil will do.

Cheers