What specifications does the metric ISO thread according to DIN 13-1 have?

This standard defines the dimensions and specifications for metric ISO threads with a standardized flank angle of 60°. The thread table contains information on pitch, root diameter, and core hole diameter for various thread sizes that are internationally used in mechanical engineering and fastening technology.

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Data table of the metric ISO thread according to DIN 13-1

Here you will find the dimensions of the worldwide standardized metric thread according to DIN 13-1 with a flank angle of 60°.

Thread	Pitch	Core diameter Internal thread [mm]	Core diameter External thread [mm]	Core hole diameter [mm]
M1	0.25	0.73	0.69	0.75
M1.2	0.25	0.93	0.89	0.95
M1.6	0.35	1.22	1.17	1.25
M2	0.40	1.57	1.51	1.60
M2.5	0.45	2.01	1.95	2.05
M3	0.50	2.46	2.39	2.50
M3.5	0.60	2.85	2.76	2.90
M4	0.70	3.24	3.14	3.30
M5	0.80	4.13	4.02	4.20
M6	1.00	4.92	4.77	5.00
M7	1.00	5.92	5.77	6.00
M8	1.25	6.65	6.47	6.80
M10	1.50	8.38	8.16	8.50
M12	1.75	10.11	9.85	10.20
M14	2.00	11.84	11.55	12.00
M16	2.00	13.84	13.55	14.00
M20	2.50	17.29	16.93	17.50
M24	3.00	20.75	20.32	21.00
M30	3.50	26.21	25.71	26.50
M36	4.00	31.67	31.09	32.00
M42	4.50	37.13	36.48	37.50

Thread Table: Metric ISO Thread DIN 13-1 – (110.22 KB)

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