ISO Metric Coarse Thread DIN 13-1

This thread is a globally standardized thread, it replaces older metric thread and most threads with inch dimensions. The label consists of the letter M followed by a number indicating the nominal diameter, the flank angle is 60 °.

Nominal Diameter mm Pitch mm Tapping Drill Size mm
M 1.0 0.25 0.78
M 1.1 0.25 0.83
M 1.2 0.25 0.93
M 1.4 0.30 1.08
M 1.6 0.35 1.22
M 1.8 0.35 1.42
M 2.0 0.40 1.57
M 2.2 0.45 1.71
M 2.5 0.45 2.01
M 3.0 0.50 2.46
M 3.5 0.60 2.85
M 4.0 0.70 3.24
M 4.5 0.75 3.69
M 5.0 0.80 4.13
M 6.0 1.00 4.92
M 7.0 1.00 5.92
M 8.0 1.25 6.65
M 9.0 1.25 7.65
M 10.0 1.50 8.38
M 11.0 1.50 9.38
M 12.0 1.75 10.11
M 14.0 2.00 11.84
M 16.0 2.00 13.84
M 18.0 2.50 15.29
M 20.0 2.50 17.29
M 22.0 2.50 19.29
M 24.0 3.00 20.75
M 27.0 3.00 23.75
M 30.0 3.50 26.21
M 33.0 3.50 29.21
M 36.0 4.00 31.67
M 39.0 4.00 34.67
M 42.0 4.50 37.13
M 45.0 4.50 40.13
M 48.0 5.00 42.59
M 52.0 5.00 46.59
M 56.0 5.50 50.05
M 60.0 5.50 54.05
M 64.0 6.00 57.51
M 68.0 6.00 61.51