Metric Tap Drill Chart
New Page 1This tap drill chart is for Metric size taps. Both NC & NF Drill size recommendations are for 70-75% thread height. Drills produce a hole slightly larger then their normal size. Size obtained will depend on drill style, condition etc. You can find a easy to use formula for calculating Metric Tap drill sizes on our Math Tricks Page
New Page 2 | Tap Size & Pitch | mm Drill | Decimal inch | Tap Size & Pitch | mm Drill | Decimal inch | | M1.6x.35 | 1.25 | .0492 | M8x1.00 | 7.00 | .2756 | | M1.8x35 | 1.45 | .0571 | M10x1.50 | 8.50 | .3346 | | M2x.40 | 1.60 | .0630 | M10x1.25 | 8.70 | .3425 | | M2.2x.45 | 1.75 | .0689 | M12x1.75 | 10.20 | .4016 | | M2.5x.45 | 2.05 | .0807 | M12x1.25 | 10.80 | .4252 | | M3x.50 | 2.50 | .0984 | M14x2.00 | 12.00 | .4724 | | M3.5x.60 | 2.90 | .1142 | M16x2.00 | 14.00 | .5512 | | M4x.70 | 3.30 | .1299 | M16x1.50 | 14.50 | .5709 | | M4.5x.75 | 3.70 | .1457 | M18x2.50 | 15.50 | .6102 | | M5x.80 | 4.20 | .1654 | M18x1.50 | 16.50 | .6496 | | M6x1.00 | 5.00 | .1969 | M20x2.50 | 17.50 | .6890 | | M7x1.00 | 6.00 | .2362 | M20x1.50 | 18.50 | .7283 | | M8x1.25 | 6.70 | .2638 | | | |
Standard
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