
Unit : mm unit: mm
| Nominal size | Bored h | Bored hole size ole size |
| ( ref.) | ||
| STI M 2×0.4 | 2.15 | |
| STI M 2.5×0.45 | 2.66 | |
| STI M 2.6×0.45 | 2.76 | |
| STI M 3×0.5 | 3.18 | |
| STI M 4×0.7 | 4.27 | |
| STI M 5×0.8 | 5.29 | |
| STI M 6×1 | 6.38 | |
| STI M 8×1.25 | 8.47 | |
| STI M10×1.5 | 10.56 | |
| STI M10×1.25 | 10.47 | |
| STI M10×1 | 10.38 | |
| STI M12×1.75 | 12.66 | |
| STI M12×1.5 | 12.56 | |
| STI M12×1.25 | 12.47 | |
| STI M14×2 | 14.75 | |
| STI M14×1.5 | 14.56 | |
| STI M14×1.25 | 14.47 | |
| STI M16×2 | 16.75 | |
| STI M16×1.5 | 16.56 | |
| STI M18×2.5 | 18.93 | |
| STI M18×1.5 | 18.56 | |
| STI M20×2.5 | 20.93 | |
| STI M20×1.5 | 20.56 | |
| STI M22×2.5 | 22.93 | |
| STI M22×1.5 | 22.56 | |
| STI M24×3 | 25.11 | |
| STI M24×1.5 | 24.56 |
| Size | Minor diameter of i Max. | nternal threads (D1) Min. | Bored hole size ( ref.) | ||
| STI No. | 2 - | 56 UNC | 2.440 | 2.284 | 2.40 |
| STI No. | 4 - | 40 UNC | 3.180 | 2.985 | 3.13 |
| STI No. | 4 - | 48 UNF | 3.121 | 2.962 | 3.08 |
| STI No. | 5 - | 40 UNC | 3.487 | 3.315 | 3.44 |
| STI No. | 6 - | 32 UNC | 3.878 | 3.678 | 3.83 |
| STI No. | 6 - | 40 UNF | 3.817 | 3.645 | 3.77 |
| STI No. | 8 - | 32 UNC | 4.523 | 4.339 | 4.48 |
| STI No. | 8 - | 36 UNF | 4.498 | 4.321 | 4.45 |
| STI No. | 10 - | 24 UNC | 5.283 | 5.055 | 5.23 |
| STI No. | 10 - | 32 UNF | 5.184 | 4.999 | 5.14 |
| STI No. | 12 - | 24 UNC | 5.943 | 5.715 | 5.89 |
| STI | 1/4 - | 20 UNC | 6.868 | 6.625 | 6.81 |
| STI | 1/4 - | 28 UNF | 6.720 | 6.546 | 6.68 |
| STI | 5/16 - | 18 UNC | 8.488 | 8.243 | 8.43 |
| STI | 5/16 - | 24 UNF | 8.351 | 8.167 | 8.31 |
| STI | 3/8 - | 16 UNC | 10.126 | 9.868 | 10.06 |
| STI | 3/8 - | 24 UNF | 9.931 | 9.754 | 9.89 |
| STI | 7/16 - | 14 UNC | 11.783 | 11.507 | 11.71 |
| STI | 7/16 - | 20 UNF | 11.584 | 11.387 | 11.53 |
| STI | 1/2 - | 13 UNC | 13.393 | 13.122 | 13.33 |
| STI | 1/2 - | 20 UNF | 13.172 | 12.975 | 13.12 |
| STI | 5/8 - | 11 UNC | 16.672 | 16.376 | 16.60 |
| STI | 5/8 - | 18 UNF | 16.385 | 16.180 | 16.33 |
| STI | 3/4 - | 16 UNF | 19.608 | 19.393 | 19.55 |