M36 × 4 tap drill size

32.00 mm drill — or 1-17/64 (1.2656 in) = 74% thread

M36 coarse series, 4 mm pitch. Tap drill Ø = nominal − pitch = 36 − 4 = 32.00 mm (≈77% thread, the standard chart value).

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