
Unit:mm Unit:mm
| Nominal size | Bored h | ole size | Bored hole size |
| Max. | Min. | ( ref.) | |
| STI M2.6×0.45 | 2.798 | 2.698 | 2.77 |
| STI M 3×0.5 | 3.221 | 3.109 | 3.19 |
| STI M 4×0.7 | 4.291 | 4.151 | 4.26 |
| STI M 5×0.8 | 5.333 | 5.173 | 5.29 |
| STI M 6×1 | 6.406 | 6.216 | 6.36 |
| STI M 8×1.25 | 8.483 | 8.271 | 8.43 |
| STI M10×1.5 | 10.561 | 10.325 | 10.50 |
| STI M10×1.25 | 10.483 | 10.271 | 10.43 |
| STI M10×1 | 10.406 | 10.216 | 10.36 |
| STI M12×1.75 | 12.644 | 12.379 | 12.6 |
| STI M12×1.5 | 12.561 | 12.325 | 12.50 |
| STI M12×1.25 | 12.483 | 12.271 | 12.43 |
| STI M14×2 | 14.733 | 14.433 | 14.7 |
| STI M14×1.5 | 14.561 | 14.325 | 14.50 |
| STI M14×1.25 | 14.483 | 14.271 | 14.43 |
| STI M16×2 | 16.733 | 16.433 | 16.7 |
| STI M16×1.5 | 16.561 | 16.325 | 16.50 |
| STI M18×2.5 | 18.897 | 18.542 | 18.8 |
| STI M18×1.5 | 18.561 | 18.325 | 18.50 |
| STI M20×2.5 | 20.897 | 20.542 | 20.8 |
| STI M20×1.5 | 20.561 | 20.325 | 20.50 |
| STI M22×2.5 | 22.897 | 22.542 | 22.8 |
| STI M22×1.5 | 22.561 | 22.325 | 22.50 |
| STI M24×3 | 25.049 | 24.649 | 24.9 |
| STI M24×2 | 24.733 | 24.433 | 24.7 |
| STI M24×1.5 | 24.561 | 24.325 | 24.50 |
| Size | Minor diameter of i Max. | nternal threads (D1) Min. | Bored hole size ( ref.) | |
| 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 | 11.7 |
| STI | 7/16- 20 UNF | 11.584 | 11.387 | 11.53 |
| STI | 1/2- 13 UNC | 13.393 | 13.122 | 13.3 |
| 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- 10 UNC | 19.908 | 19.599 | 19.8 |
| STI | 3/4- 16 UNF | 19.608 | 19.393 | 19.55 |
Technical Inf