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Metric thread for general use (standard dimensions) (Excerpt from JIS B 0205-4: 2001)

D: : Standard dimension of female thread root diameter (nominal diameter)

D2: : Standard dimension of female thread effective diameter

D1: : Standard dimension of the female thread inner diameter

H: : Fundamental triangle height

d: : Standard dimension of male thread outer diameter (nominal diameter)

d2: : Standard dimension of male thread effective diameter

d1: : Standard dimension of male thread root diameter

P: : Pitch

Values for D2, d2, D1, and d1 calculated using the following formulae, are displayed in the table rounded to 3 decimal places.

(Unit: mm)

Nominal diameter = Male thread outer diameter d	Pitch P	Effective diameter D₂, d₂	Female thread inner diameter D₁
1	0.25	0.838	0.729
1	0.2	0.870	0.783
1.1	0.25	0.938	0.829
1.1	0.2	0.970	0.883
1.2	0.25	1.038	0.929
1.2	0.2	1.070	0.983
1.4	0.3	1.205	1.075
1.4	0.2	1.270	1.183
1.6	0.35	1.373	1.221
1.6	0.2	1.470	1.383
1.8	0.35	1.573	1.421
1.8	0.2	1.670	1.583
2	0.4	1.740	1.567
2	0.25	1.838	1.729
2.2	0.45	1.908	1.713
2.2	0.25	2.038	1.929
2.5	0.45	2.208	2.013
2.5	0.35	2.273	2.121
3	0.5	2.675	2.459
3	0.35	2.773	2.621
3.5	0.6	3.110	2.850
3.5	0.35	3.273	3.121
4	0.7	3.545	3.242
4	0.5	3.675	3.459
4.5	0.75	4.013	3.688
4.5	0.5	4.175	3.959
5	0.8	4.480	4.134
5	0.5	4.675	4.459
5.5	0.5	5.175	4.959
6	1	5.350	4.917
6	0.75	5.513	5.188
7	1	6.350	5.917
7	0.75	6.513	6.188
8	1.25	7.188	6.647
	1	7.350	6.917
	0.75	7.513	7.188
9	1.25	8.188	7.647
	1	8.350	7.917
	0.75	8.513	8.188
10	1.5	9.026	8.376
	1.25	9.188	8.647
	1	9.350	8.917
	0.75	9.513	9.188
11	1.5	10.026	9.376
	1	10.350	9.917
	0.75	10.513	10.188
12	1.75	10.863	10.106
	1.5	11.026	10.376
	1.25	11.188	10.647
	1	11.350	10.917
14	2	12.701	11.835
	1.5	13.026	12.376
	1.25	13.188	12.647
	1	13.350	12.917
Nominal diameter = Male thread outer diameter d	Pitch P	Effective diameter D₂, d₂	Female thread inner diameter D₁
15	1.5	14.026	13.376
15	1	14.350	13.917
16	2	14.701	13.835
	1.5	15.026	14.376
	1	15.350	14.917
17	1.5	16.026	15.376
17	1	16.350	15.917
18	2.5	16.376	15.294
	2	16.701	15.835
	1.5	17.026	16.376
	1	17.350	16.917
20	2.5	18.376	17.294
	2	18.701	17.835
	1.5	19.026	18.376
	1	19.350	18.917
22	2.5	20.376	19.294
	2	20.701	19.835
	1.5	21.026	20.376
	1	21.350	20.917
24	3	22.051	20.752
	2	22.701	21.835
	1.5	23.026	22.376
	1	23.350	22.917
25	2	23.701	22.835
	1.5	24.026	23.376
	1	24.350	23.917
26	1.5	25.026	24.376
27	3	25.051	23.752
	2	25.701	24.835
	1.5	26.026	25.376
	1	26.350	25.917
28	2	26.701	25.835
	1.5	27.026	26.376
	1	27.350	26.917
30	3.5	27.727	26.211
	3	28.051	26.752
	2	28.701	27.835
	1.5	29.026	28.376
	1	29.350	28.917
32	2	30.701	29.835
32	1.5	31.026	30.376
33	3.5	30.727	29.211
	3	31.051	29.752
	2	31.701	30.835
	1.5	32.026	31.376
35	1.5	34.026	33.376
36	4	33.402	31.670
	3	34.051	32.752
	2	34.701	33.835
	1.5	35.026	34.376
38	1.5	37.026	36.376
39	4	36.402	34.670
	3	37.051	35.752
	2	37.701	36.835
	1.5	38.026	37.376
Nominal diameter = Male thread outer diameter d	Pitch P	Effective diameter D₂, d₂	Female thread inner diameter D₁
40	3	38.051	36.752
	2	38.701	37.835
	1.5	39.026	38.376
42	4.5	39.077	37.129
	4	39.402	37.670
	3	40.051	38.752
	2	40.701	39.835
	1.5	41.026	40.376
45	4.5	42.077	40.129
	4	42.402	40.670
	3	43.051	41.752
	2	43.701	42.835
	1.5	44.026	43.376
48	5	44.752	42.587
	4	45.402	43.670
	3	46.051	44.752
	2	46.701	45.835
	1.5	47.026	46.376
50	3	48.051	46.752
	2	48.701	47.835
	1.5	49.026	48.376
52	5	48.752	46.587
	4	49.402	47.670
	3	50.051	48.752
	2	50.701	49.835
	1.5	51.026	50.376
55	4	52.402	50.670
	3	53.051	51.752
	2	53.701	52.835
	1.5	54.026	53.376
56	5.5	52.428	50.046
	4	53.402	51.670
	3	54.051	52.752
	2	54.701	53.835
	1.5	55.026	54.376
58	4	55.402	53.670
	3	56.051	54.752
	2	56.701	55.835
	1.5	57.026	56.376
60	5.5	56.428	54.046
	4	57.402	55.670
	3	58.051	56.752
	2	58.701	57.835
	1.5	59.026	58.376

Reference

*Standard dimensions d of male thread outer diameter are equal to standard dimensions D of female thread root diameter.
*Standard dimensions D1 of female thread inner diameter are equal to standard dimensions d1 of male thread root diameter.