4-1.Metric coarse screw
[JIS B 0205]
unit=mm
Nominal screw pitch
P		 Caught
height
H1		 Female thread
Valley diameter D Effective diameter D2 Inner diameter D1
Male screw
Column 1 Column 2 Column 3 Outer diameter d Effective diameter d2 Valley diameter d1
M1

M1.2
M1.1


0.25
0.25
0.25		 0.135
0.135
0.135		 1.000
1.100
1.200 		0.838
0.938
1.038 		0.729
0.829
0.929
M1.6 M1.4

M1.8


0.3
0.35
0.35		 0.162
0.189
0.189		 1.400
1.600
1.800		 1.205
1.373
1.573		 1.075
1.221
1.421
M2

M2.5
M2.2


0.4
0.45
0.45		 0.217
0.244
0.244		 2.000
2.200
2.500		 1.740
1.908
2.208		 1.567
1.713
2.013
M3

M4
M3.5


0.5
0.6
0.7		 0.271
0.325
0.379		 3.000
3.500
4.000		 2.675
3.110
3.545		 2.459
2.850
3.242

M5
M6		 M4.5


0.75
0.8
1		 0.406
0.433
0.541		 4.500
5.000
6.000		 4.013
4.480
5.350		 3.688
4.134
4.917

M8


M7

M9		 1
1.25
1.25		 0.541
0.677
0.677		 7.000
8.000
9.000		 6.350
7.188
8.188		 5.917
6.647
7.647
M10

M12



M11		 1.5
1.5
1.75		 0.812
0.812
0.947		 10.000
11.000
12.000		 9.026
10.026
10.863		 8.376
9.376
10.106

M16		 M14

M18


2
2
2.5		 1.083
1.083
1.353		 14.000
16.000
18.000		 12.701
14.701
16.376		 11.835
13.835
15.294
M20

M24
M22


2.5
2.5
3		 1.353
1.353
1.624		 20.000
22.000
24.000		 18.376
20.376
22.051		 17.294
19.294
20.752

M30		 M27

M33


3
3.5
3.5		 1.624
1.894
1.894		 27.000
30.000
33.000		 25.051
27.727
30.727		 23.752
26.211
29.211
M36

M42
M39


4
4
4.5		 2.165
2.165
2.436		 36.000
39.000
42.000		 33.402
36.402
39.077		 31.670
34.670
37.129

M48		 M45

M52


4.5
5
5		 2.436
2.706
2.706		 45.000
48.000
52.000		 42.077
44.752
48.752		 40.129
42.587
46.587
M56

M64
M60

M68



5.5
5.5
6
6		 2.977
2.977
3.248
3.248		 56.000
60.000
64.000
68.000		 52.428
56.428
60.103
64.103		 50.046
54.046
57.505
61.505
Reference: "JIS Handbook Screw 2001", page 95, quoted from metric coarse screw.