Metric thread and tap drill chart
SizePitch (mm)Tap drill (mm)Clearance (mm)
M30.52.53.4
M40.73.34.5
M50.84.25.5
M61.05.06.6
M81.256.89.0
M101.58.511.0
M121.7510.213.5
M142.012.015.5
M162.014.017.5
M182.515.520.0
M202.517.522.0
M222.519.524.0
M243.021.026.0

Metric coarse thread. Tap drill = hole before tapping; clearance = through-hole (medium fit).

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