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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