What are the characteristics of the metric ISO fine thread according to DIN 13-2?

The metric ISO fine thread has a lower pitch compared to the standard thread, which allows for greater self-locking and thereby makes it suitable for connections that should not come loose by themselves. It is primarily used in precision engineering and in applications that require high precision.

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Data table of the metric ISO fine thread according to DIN 13-2

Here you will find the dimensions of the metric fine thread according to DIN 13-2 with a flank angle of 60°. Compared to the metric standard thread, the fine thread has a smaller pitch, which leads to a higher self-locking effect.

Thread	Pitch	Core diameter Internal thread [mm]	Core diameter External thread [mm]
M2	0.25	1.73	1.69
M3	0.25	2.73	2.69
M4	0.2	3.78	3.76
M4	0.35	3.62	3.57
M5	0.25	4.73	4.69
M5	0.5	4.46	4.39
M6	0.25	5.73	5.69
M6	0.5	5.46	5.39
M6	0.75	5.19	5.08
M8	0.25	7.73	7.69
M8	0.50	7.46	7.39
M8	1.00	6.92	6.77
M10	0.25	9.73	9.69
M12	0.5	9.46	9.39
M10	1.00	8.92	8.77
M12	0.35	11.62	11.57
M12	0.50	11.46	11.39
M12	1.00	10.92	10.77
M16	0.50	15.46	15.39
M16	1.00	14.92	14.77
M16	1.50	14.38	14.16
M20	1.00	18.92	18.77
M20	1.50	18.38	18.16
M24	1.50	22.38	22.16
M24	2.00	21.84	21.55
M30	1.50	28.38	28.16
M30	2.00	27.84	27.55
M36	1.50	34.38	34.16
M36	2.00	33.84	33.55
M42	1.50	40.38	40.16
M42	2.00	39.84	39.55
M48	1.50	46.38	46.16
M48	2.00	45.84	45.55
M56	1.50	54.38	54.16
M56	2.00	53.84	53.55
M64	2.00	61.84	61.55

Thread Table: Metric ISO Fine Thread DIN 13-2 – (110.68 KB)

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