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Metric Fine Screws (Excerpt from JIS B 0207:1982 [Reference])

(This standard was discontinued in December 2001 and replaced with the newJIS B 0205-1 to 4.)

Metric Fine Screws (Excerpt from JIS B 0207:1982 [Reference])
H
=0.866025P
H1
=0.541266P
d2
=d-0.649519P
d1
=d-1.082532P
D
=d
D2
=d2
D1
=d1

(Unit: mm)

Nominal thread size Pitch

P
Connection height H1 Female thread
Valley diameter D Effective diameter D2 Inner diameter D1
Male thread
Outer diameter d Effective diameter d2 Valley diameter d1
M 1 ×0.2
M 1.1×0.2
M 1.2×0.2
M 1.4×0.2
M 1.6×0.2
M 1.8×0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.108
0.108
0.108
0.108
0.108
0.108
1.000
1.100
1.200
1.400
1.600
1.800
0.870
0.970
1.070
1.270
1.470
1.670
0.783
0.883
0.983
1.183
1.383
1.583
M 2 ×0.25
M 2.2×0.25
0.25
0.25
0.135
0.135
2.000
2.200
1.838
2.038
1.729
1.929
M 2.5×0.35
M 3 ×0.35
M 3.5×0.35
0.35
0.35
0.35
0.189
0.189
0.189
2.500
3.000
3.500
2.273
2.773
3.273
2.121
2.621
3.121
M 4 ×0.5
M 4.5×0.5
M 5 ×0.5
M 5.5×0.5
0.5
0.5
0.5
0.5
0.271
0.271
0.271
0.271
4.000
4.500
5.000
5.500
3.675
4.175
4.675
5.175
3.459
3.959
4.459
4.959
M 6 ×0.75
M 7 ×0.75
0.75
0.75
0.406
0.406
6.000
7.000
5.513
6.513
5.188
6.188
M 8 ×1
M 8 ×0.75
1
0.75
0.541
0.406
8.000
8.000
7.350
7.513
6.917
7.188
M 9 ×1
M 9 ×0.75
1
0.75
0.541
0.406
9.000
9.000
8.350
8.513
7.917
8.188
M 10 ×1.25
M 10 ×1
M 10 ×0.75
1.25
1
0.75
0.677
0.541
0.406
10.000
10.000
10.000
9.188
9.350
9.513
8.647
8.917
9.188
M 11 ×1
M 11 ×0.75
1
0.75
0.541
0.406
11.000
11.000
10.350
10.513
9.917
10.188
M 12 ×1.5
M 12 ×1.25
M 12 ×1
1.5
1.25
1
0.812
0.677
0.541
12.000
12.000
12.000
11.026
11.188
11.350
10.376
10.647
10.917
M 14 ×1.5
M 14 ×1.25
M 14 ×1
1.5
1.25
1
0.812
0.677
0.541
14.000
14.000
14.000
13.026
13.188
13.350
12.376
12.647
12.917
M 15 ×1.5
M 15 ×1
1.5
1
0.812
0.541
15.000
15.000
14.026
14.350
13.376
13.917
M 16 ×1.5
M 16 ×1
1.5
1
0.812
0.541
16.000
16.000
15.026
15.350
14.376
14.917
M 17 ×1.5
M 17 ×1
1.5
1
0.812
0.541
17.000
17.000
16.026
16.350
15.376
15.917
M 18 ×2
M 18 ×1.5
M 18 ×1
2
1.5
1
1.083
0.812
0.541
18.000
18.000
18.000
16.701
17.026
17.350
15.835
16.376
16.917
M 20 ×2
M 20 ×1.5
M 20 ×1
2
1.5
1
1.083
0.812
0.541
20.000
20.000
20.000
18.701
19.026
19.350
17.835
18.376
18.917
M 22 ×2
M 22 ×1.5
M 22 ×1
2
1.5
1
1.083
0.812
0.541
22.000
22.000
22.000
20.701
21.026
21.350
19.835
20.376
20.917
M 24 ×2
M 24 ×1.5
M 24 ×1
2
1.5
1
1.083
0.812
0.541
24.000
24.000
24.000
22.701
23.026
23.350
21.835
22.376
22.917
Nominal thread size Pitch
P
Connection height H1 Female thread
Valley diameter D Effective diameter D2 Inner diameter D1
Male thread
Outer diameter d Effective diameter d2 Valley diameter d1
M 25×2
M 25×1.5
M 25×1
2
1.5
1
1.083
0.812
0.541
25.000
25.000
25.000
23.701
24.026
24.350
22.835
23.376
23.917
M 26×1.5 1.5 0.812 26.000 25.026 24.376
M 27×2
M 27×1.5
M 27×1
2
1.5
1
1.083
0.812
0.541
27.000
27.000
27.000
25.701
26.026
26.350
24.835
25.376
25.917
M 28×2
M 28×1.5
M 28×1
2
1.5
1
1.083
0.812
0.541
28.000
28.000
28.000
26.701
27.026
27.350
25.835
26.376
26.917
M 30×3
M 30×2
M 30×1.5
M 30×1
3
2
1.5
1
1.624
1.083
0.812
0.541
30.000
30.000
30.000
30.000
28.051
28.701
29.026
29.350
26.752
27.835
28.376
28.917
M 32×2
M 32×1.5
2
1.5
1.082
0.812
32.000
32.000
30.701
31.026
29.835
30.376
M 33×3
M 33×2
M 33×1.5
3
2
1.5
1.624
1.083
0.812
33.000
33.000
33.000
31.051
31.701
32.026
29.752
30.835
31.376
M 35×1.5 1.5 0.812 35.000 34.026 33.376
M 36×3
M 36×2
M 36×1.5
3
2
1.5
1.624
1.083
0.812
36.000
36.000
36.000
34.051
34.701
35.026
32.752
33.835
34.376
M 38×1.5 1.5 0.812 38.000 37.026 36.376
M 39×3
M 39×2
M 39×1.5
3
2
1.5
1.624
1.083
0.812
39.000
39.000
39.000
37.051
37.701
38.026
35.752
36.835
37.376
M 40×3
M 40×2
M 40×1.5
3
2
1.5
1.624
1.083
0.812
40.000
40.000
40.000
38.051
38.701
39.026
36.752
37.835
38.376
M 42×4
M 42×3
M 42×2
M 42×1.5
4
3
2
1.5
2.165
1.624
1.083
0.812
42.000
42.000
42.000
42.000
39.402
40.051
40.701
41.026
37.670
38.752
39.835
40.376
M 45×4
M 45×3
M 45×2
M 45×1.5
4
3
2
1.5
2.165
1.624
1.083
0.812
45.000
45.000
45.000
45.000
42.402
43.051
43.701
44.026
40.670
41.752
42.835
43.376
M 48×4
M 48×3
M 48×2
M 48×1.5
4
3
2
1.5
2.165
1.624
1.083
0.812
48.000
48.000
48.000
48.000
45.402
46.051
46.701
47.026
43.670
44.752
45.835
46.376
M 50×3
M 50×2
M 50×1.5
3
2
1.5
1.624
1.083
0.812
50.000
50.000
50.000
48.051
48.701
49.026
46.752
47.835
48.376
M 52×4
M 52×3
M 52×2
M 52×1.5
4
3
2
1.5
2.165
1.624
1.083
0.812
52.000
52.000
52.000
52.000
49.402
50.051
50.701
51.026
47.670
48.752
49.835
50.376
M 55×4
M 55×3
M 55×2
M 55×1.5
4
3
2
1.5
2.165
1.624
1.083
0.812
55.000
55.000
55.000
55.000
52.402
53.051
53.701
54.026
50.670
51.752
52.835
53.376

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