M6 × 1 tap drill size
5.00 mm drill — or #9 (0.1960 in) = 79% thread
M6 coarse series, 1 mm pitch. Tap drill Ø = nominal − pitch = 6 − 1 = 5.00 mm (≈77% thread, the standard chart value).
| Drill | Size | Thread % |
|---|---|---|
| 5.00 mm | 0.1969 in | 77% |
| #9 (inch) | 0.1960 in / 4.98 mm | 79% |
Rounding to your nearest stock drill moves the thread percentage only a few points. Cut taps only — roll-form taps need a larger hole. Verify before you cut.
Need a different thread percentage? Open the tap drill calculator · Metric tap chart · All calculators