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Old 25th Jun 2021, 5:23 pm   #4
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,485
Default Re: Tapping a hole in metal: What size hole?

Thanks gents, it seems that the general answer is that you do NOT use a drill which equals the 'M' size of the tap / screw to be used, but rather one which is of slightly smaller diameter. That's what I instinctively expected.
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