A screw thread in
conformity with this International Standard is designated by the
letter M followed by the values of the nominal diameter and of
the
pitch expressed in millimeters separated by the sign x. |
Example : M 8 x 1.0 (Fine pitch 1.0) |
The absence of the indication of pitch means
that
the coarse pitch is specified. |
Example : M 8 (Coarse pitch 1.25) |
The words "coarse" and "fine" are given in
order
to conform to usage. No concept of quality however, is
associated
with these words. "Coarse" pitches are the largest metric
pitches
used. For the diameter selected, choose one of the pitches shown
on
the corresponding line. |
Basic Major
Diameter
|
Nominal Diameter
(mm)
|
STD |
Pitch in mm |
Inch |
mm |
Coarse |
Fine |
M Taper |
.0118 |
0.30 |
0.30 |
X |
0.075 |
|
|
.0118 |
0.30 |
0.30 |
* |
0.080 |
|
|
.0138 |
0.35 |
0.35 |
** |
0.090 |
|
|
.0146 |
0.37 |
|
|
|
|
|
.0157 |
0.40 |
0.40 |
*X |
0.100 |
|
|
.0165 |
0.42 |
|
|
|
|
|
.0177 |
0.45 |
0.45 |
** |
0.100 |
|
|
.0189 |
0.48 |
|
|
|
|
|
.0197 |
0.50 |
0.50 |
*X |
0.125 |
|
|
.0209 |
0.53 |
|
|
|
|
|
.0213 |
0.54 |
|
|
|
|
|
.0217 |
0.55 |
0.55 |
** |
0.125 |
|
|
.0236 |
0.60 |
0.60 |
*X |
0.150 |
|
|
.0244 |
0.62 |
|
|
|
|
|
.0276 |
0.70 |
0.70 |
|
0.175 |
|
|
.0311 |
0.79 |
|
|
|
|
|
.0315 |
0.80 |
0.80 |
*X |
0.200 |
|
|
.0340 |
0.86 |
|
|
|
|
|
.0354 |
0.90 |
0.90 |
**X |
0.225 |
|
|
.0394 |
1.00 |
1.00 |
*X |
0.250 |
0.2 |
|
.0433 |
1.10 |
1.10 |
** |
0.250 |
0.2 |
|
.0470 |
1.19 |
|
|
|
|
|
.0472 |
1.20 |
1.20 |
*X |
0.250 |
0.2 |
|
.0512 |
1.30 |
|
|
|
|
|
.0551 |
1.40 |
1.40 |
**X |
0.300 |
0.2 |
|
.0591 |
1.50 |
1.50 |
|
0.300 |
|
|
.0600 |
1.52 |
|
|
|
|
|
.0629 |
1.60 |
1.60 |
* |
0.350 |
0.2 |
|
.0669 |
1.70 |
1.70 |
X |
0.350 |
0.2,0.25 |
|
.0709 |
1.80 |
1.80 |
** |
0.350 |
0.2 |
|
.0730 |
1.85 |
|
|
|
|
|
.0748 |
1.90 |
|
|
|
|
|
.0787 |
2.00 |
2.00 |
*X |
0.400 |
0.25,0.35 |
|
.0860 |
2.18 |
|
|
|
|
|
.0866 |
2.20 |
2.20 |
** |
0.450 |
0.25 |
|
.0906 |
2.30 |
2.30 |
X |
0.400 |
0.25,0.35 |
|
.0984 |
2.50 |
2.50 |
* |
0.45 |
0.35 |
|
.0990 |
2.51 |
|
|
|
|
|
.1024 |
2.60 |
2.60 |
X |
0.45 |
0.25,0.35 |
|
.1102 |
2.80 |
|
|
|
|
|
.1120 |
2.84 |
|
|
|
|
|
.1181 |
3.00 |
3.00 |
*X |
0.50 |
0.35 |
|
.1250 |
3.18 |
|
|
|
|
|
.1260 |
3.20 |
|
|
|
|
|
.1380 |
3.50 |
3.50 |
**X |
0.60 |
0.35,0.5 |
|
.1417 |
3.60 |
|
|
|
|
|
.1575 |
4.00 |
4.00 |
*X |
0.70 |
0.5,0.75 |
|
.1614 |
4.10 |
|
|
|
|
|
.1640 |
4.17 |
|
|
|
|
|
.1772 |
4.50 |
4.50 |
** |
0.75 |
0.5 |
|
.1850 |
4.70 |
|
|
|
|
|
.1875 |
4.76 |
|
|
|
|
|
.1900 |
4.83 |
|
|
|
|
|
.1969 |
5.00 |
5.00 |
*X |
0.80 |
0.5, 0.75, 0.90 |
|
.2087 |
5.30 |
|
|
|
|
|
.2160 |
5.49 |
|
|
|
|
|
.2165 |
5.50 |
5.50 |
*** |
0.90 |
0.5 |
|
.2188 |
5.56 |
|
|
|
|
|
.2362 |
6.00 |
6.00 |
*X |
1.00 |
0.5, 0.75 |
|
.2500 |
6.35 |
|
|
|
|
|
.2756 |
7.00 |
7.00 |
***X |
1.00 |
0.5, 0.75 |
|
.2812 |
7.14 |
|
|
|
|
|
.3125 |
7.94 |
|
|
|
|
|
.3125 |
7.94 |
|
|
|
|
|
.3150 |
8.00 |
8.00 |
*X |
1.25 |
0.5, 0.75, 1 |
|
.3543 |
9.00 |
9.00 |
***X |
1.25 |
0.75, 1 |
|
.3750 |
9.53 |
|
|
|
|
|
.3830 |
9.73 |
|
|
|
|
1 |
.3937 |
10.00 |
10.00 |
*X |
1.5 |
0.75, 1, 1.25 |
|
.4050 |
10.29 |
|
|
|
|
|
.4331 |
11.00 |
11.00 |
***X |
1.5 |
0.75, 1, 1.25 |
|
.4375 |
11.11 |
|
|
|
|
|
.4724 |
12.00 |
12.00 |
*X |
1.75 |
1, 1.25, 1.5 |
1.5 |
.5000 |
12.70 |
|
|
|
|
|
.5180 |
13.16 |
|
|
|
|
|
.5400 |
13.72 |
|
|
|
|
|
.5512 |
14.00 |
14.00 |
**X |
2.00 |
1, 1.25, 1.5 |
|
.5625 |
14.29 |
|
|
|
|
|
.6250 |
15.88 |
|
|
|
|
|
.6299 |
16.00 |
16.00 |
*X |
2.00 |
1, 1.5 |
1.5 |
.6560 |
16.66 |
|
|
|
|
|
.6750 |
17.15 |
|
|
|
|
|
.6875 |
17.46 |
|
|
|
|
|
.7087 |
18.00 |
18.00 |
**X |
2.5 |
1, 1.5, 2 |
1.5 |
.7500 |
19.05 |
|
|
|
|
|
.7874 |
20.00 |
20 |
*X |
2.5 |
1, 1.5, 2 |
1.5 |
.8125 |
20.64 |
|
|
|
|
|
.8250 |
20.96 |
|
|
|
|
|
.8400 |
21.34 |
|
|
|
|
|
.8661 |
22.00 |
22 |
**X |
2.5 |
1, 1.5, 2 |
1.5 |
.8750 |
22.23 |
|
|
|
|
|
.9020 |
22.91 |
|
|
|
|
|
.9375 |
23.81 |
|
|
|
|
|
.9449 |
24.00 |
24 |
*X |
3 |
1, 1.5, 2 |
|
1.0000 |
25.40 |
|
|
|
|
|
1.0236 |
26.00 |
26 |
***X |
|
1.5 |
1.5 |
1.041011 |
26.44 |
|
|
|
|
|
1.0500 |
26.67 |
|
|
|
|
|
1.0625 |
26.99 |
|
|
|
|
|
1.0630 |
27.00 |
27 |
**X |
3 |
1, 1.5, 2 |
|
1.1250 |
28.58 |
|
|
|
|
|
1.1811 |
30.00 |
30 |
*X |
3.5 |
1, 1.5, 2, 3 |
|
1.1875 |
30.16 |
|
|
|
|
|
1.1890 |
30.20 |
|
|
|
|
|
1.2500 |
31.75 |
|
|
|
|
|
1.2598 |
32.00 |
32 |
***X |
|
1.5, 2 |
|
1.2992 |
33.00 |
33 |
**X |
3.5 |
1.5, 2, 3 |
|
1.3090 |
33.25 |
|
|
|
|
|
1.3125 |
33.34 |
|
|
|
|
|
1.3150 |
33.40 |
|
|
|
|
|
1.3750 |
34.93 |
|
|
|
|
|
1.3780 |
35.00 |
35 |
***X |
|
1.5 |
|
1.4173 |
36.00 |
36 |
*X |
4 |
1.5, 2, 3 |
|
1.4375 |
36.51 |
|
|
|
|
|
1.4920 |
37.90 |
|
|
|
1.5 |
|
1.4961 |
38.00 |
38 |
***X |
|
|
|
1.5000 |
38.10 |
|
|
|
|
|
1.5354 |
39.00 |
39 |
**X |
4 |
1.5, 2, 3 |
|
1.5625 |
39.69 |
|
|
|
|
|
1.5748 |
40.00 |
40 |
***X |
|
1.5, 2, 3 |
|
1.6250 |
41.28 |
|
|
|
|
|
1.6500 |
41.91 |
|
|
|
|
|
1.6535 |
42.00 |
42 |
*X |
4.5 |
1.5, 2, 3, 4 |
|
1.6600 |
42.16 |
|
|
|
|
|
1.6875 |
42.86 |
|
|
|
|
|
1.7450 |
44.32 |
|
|
|
|
|
* ISO Standard-1st Choice
** ISO Standard-2nd Choice
*** ISO Standard-3rd Choice
X DIN (German Standard) |
|