| メートル並目ねじ | |
| 呼び | 下穴サイズ |
| M1×0.25 | 0.75 |
| M1.1×0.25 | 0.85 |
| M1.2×0.25 | 0.95 |
| M1.4×0.3 | 1.1 |
| M1.6×0.35 | 1.3 |
| M1.7×0.35 | 1.4 |
| M1.8×0.35 | 1.5 |
| M2×0.4 | 1.6 |
| M2.2×0.45 | 1.8 |
| M2.3×0.4 | 1.9 |
| M2.5×0.45 | 2.1 |
| M2.6×0.45 | 2.2 |
| M3×0.5 | 2.5 |
| M3.5×0.6 | 2.9 |
| M4×0.7 | 3.3 |
| M4.5×0.75 | 3.8 |
| M5×0.8 | 4.2 |
| M6×1 | 5.0 |
| M7×1 | 6.0 |
| M8×1.25 | 6.8 |
| M9×1.25 | 7.8 |
| M10×1.5 | 8.5 |
| M11×1.5 | 9.5 |
| M12×1.75 | 10.3 |
| M14×2 | 12.0 |
| M16×2 | 14.0 |
| M18×2.5 | 15.5 |
| M20×2.5 | 17.5 |
| M22×2.5 | 19.5 |
| M24×3 | 21.0 |
| M27×3 | 24.0 |
| M30×3.5 | 26.5 |
| M33×3.5 | 29.5 |
| M36×4 | 32.0 |
| M39×4 | 35.0 |
| M42×4.5 | 37.5 |
| M45×4.5 | 40.5 |
| M48×5 | 43. |