| メートル並目 |
| 呼 ビ |
ピッチ
（P） |
２級ネジ
下穴ドリル直径
（mm） |
２級ネジ
内径(MAX)
（mm） |
３級ネジ
内径(MAX)
（mm） |
|---|
| Ｍ2 |
0.40 |
1.6 |
1.679 |
― |
| Ｍ2.2 |
0.45 |
1.75 |
1.838 |
― |
| Ｍ2.3※ |
0.40 |
1.9 |
1.979 |
― |
| Ｍ2.5 |
0.45 |
2.1 |
2.138 |
― |
| Ｍ2.6※ |
0.45 |
2.2 |
2.238 |
― |
| Ｍ3 |
0.50 |
2.5 |
2.599 |
2.639 |
| Ｍ3.5 |
0.60 |
2.9 |
3.01 |
3.05 |
| Ｍ4 |
0.70 |
3.3 |
3.422 |
3.466 |
| Ｍ4.5 |
0.75 |
3.8 |
3.878 |
3.924 |
| Ｍ5 |
0.80 |
4.2 |
4.334 |
4.384 |
| Ｍ6 |
1.00 |
5.1 |
5.153 |
5.217 |
| Ｍ7 |
1.00 |
6.1 |
6.153 |
6.217 |
| Ｍ8 |
1.25 |
6.8 |
6.912 |
6.982 |
| Ｍ9 |
1.25 |
7.8 |
7.912 |
7.982 |
| Ｍ10 |
1.50 |
8.6 |
8.676 |
8.751 |
| Ｍ11 |
1.50 |
9.6 |
9.676 |
9.751 |
| Ｍ12 |
1.75 |
10.3 |
10.441 |
10.531 |
| Ｍ14 |
2.0 |
12.1 |
12.21 |
12.31 |
| Ｍ16 |
2.0 |
14 |
14.21 |
14.31 |
| Ｍ18 |
2.5 |
15.5 |
15.744 |
15.854 |
| Ｍ20 |
2.5 |
17.5 |
17.744 |
17.854 |
| Ｍ22 |
2.5 |
19.5 |
19.744 |
19.854 |
| Ｍ24 |
3.0 |
21 |
21.252 |
21.382 |
| Ｍ27 |
3.0 |
24 |
24.252 |
24.382 |
| Ｍ30 |
3.5 |
26.5 |
26.771 |
26.921 |
| Ｍ33 |
3.5 |
29.5 |
29.771 |
29.921 |
| Ｍ36 |
4.0 |
32 |
32.27 |
32.42 |
| Ｍ39 |
4.0 |
35 |
35.27 |
35.42 |
| Ｍ42 |
4.5 |
37.5 |
37.799 |
37.979 |
| Ｍ45 |
4.5 |
40.5 |
40.799 |
40.979 |
| Ｍ48 |
5.0 |
43 |
43.297 |
43.487 |
|
