| ねじの呼び径(M) | 呼び長さ(mm) | ねじピッチ(mm) | 仕様例 |
| M2 | 2–12 | 0.4 | M26、M28 |
| M2.5 | 2.5–12 | 0.45 | M2.58、M2.510 |
| M3 | 3–30 | 0.5 | M312、M320 |
| M4 | 4–50 | 0.7 | M420、M430 |
| M5 | 5–50 | 0.8 | M516、M525 |
| M6 | 6–60 | 1.0 | M620、M630 |
| M8 | 8–60 | 1.25 | M825、M840 |
| M10 | 10–60 | 1.5 | M1030、M1050 |
| M12 | 12–60 | 1.75 | M1230、M1250 |
| M14 | 14–60 | 2.0 | M1435、M1450 |
| M16 | 16–60 | 2.0 | M1640、M1660 |