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Anonymous Poster

NPT Tap Calculation

11/20/2010 6:35 AM

how to calculate npt tap drill size
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lyn
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#1

Re: npt tap calculation

11/20/2010 9:04 AM

Why not just use one of the hundreds of tables on the internet?
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philroth2252
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Re: NPT Tap Calculation

11/28/2010 12:41 AM

Standard NPT Tap Drill Sizes NPT Size Tap Drill Size (in.) Decimal Equivalent (in.) 1/16 - 27 "C" 0.242 1/8 - 27 "Q" 0.332 1/4 - 18 7/16 0.438 3/8 - 18 9/16 0.562 1/2 - 14 45/64 0.703 3/4 - 14 29/32 0.906 1.0 - 11•1/2 1•9/64 1.141 1•1/4 - 11•1/2 1•31/64 1.484 1•1/2 - 11•1/2 1•23/32 1.719 2.0 - 11•1/2 2•3/16 2.188 2•1/2 - 8 2•39/64 2.609 3.0 - 8 3•15/64 3.234 Give little receive little
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