
Unit:mm Unit:mm
Bored hole size Bored hole size Minor diameter of internal threads (D ) Bored hole size
Nominal size Size 1
| Max. | Min. | ( ref.) | Max. | Min. | ( ref.) | |||
| STI M2.6 × 0.45 | 2.798 | 2.698 | 2.77 | STI No. 4 - 40 UNC | 3.180 | 2.985 | 3.13 | |
| STI M 3 × 0.5 | 3.221 | 3.109 | 3.19 | STI No. 4 - 48 UNF | 3.121 | 2.962 | 3.08 | |
| STI M 4 × 0.7 | 4.291 | 4.151 | 4.26 | STI No. 5 - 40 UNC | 3.487 | 3.315 | 3.44 | |
| STI M 5 × 0.8 | 5.333 | 5.173 | 5.29 | STI No. 6 - 32 UNC | 3.878 | 3.678 | 3.83 | |
| STI M 6 × 1 | 6.406 | 6.216 | 6.36 | STI No. 6 - 40 UNF | 3.817 | 3.645 | 3.77 | |
| STI M 8 × 1.25 | 8.483 | 8.271 | 8.43 | STI No. 8 - 32 UNC | 4.523 | 4.339 | 4.48 | |
| STI M10 × 1.5 | 10.561 | 10.325 | 10.50 | STI No. 8 - 36 UNF | 4.498 | 4.321 | 4.45 | |
| STI M10 × 1.25 | 10.483 | 10.271 | 10.43 | STI No. 10 - 24 UNC | 5.283 | 5.055 | 5.23 | |
| STI M10 × 1 | 10.406 | 10.216 | 10.36 | STI No. 10 - 32 UNF | 5.184 | 4.999 | 5.14 | |
| STI M12 × 1.75 | 12.644 | 12.379 | 12.6 | STI No. 12 - 24 UNC | 5.943 | 5.715 | 5.89 | |
| STI M12 × 1.5 | 12.561 | 12.325 | 12.50 | STI | 1/4 - 20 UNC | 6.868 | 6.625 | 6.81 |
| STI M12 × 1.25 | 12.483 | 12.271 | 12.43 | STI | 1/4 - 28 UNF | 6.720 | 6.546 | 6.68 |
| STI M14 × 2 | 14.733 | 14.433 | 14.7 | STI | 5/16 - 18 UNC | 8.488 | 8.243 | 8.43 |
| STI M14 × 1.5 | 14.561 | 14.325 | 14.50 | STI | 5/16 - 24 UNF | 8.351 | 8.167 | 8.31 |
| STI M14 × 1.25 | 14.483 | 14.271 | 14.43 | STI | 3/ 8 - 16 UNC | 10.126 | 9.868 | 10.06 |
| STI M16 × 2 | 16.733 | 16.433 | 16.7 | STI | 3/ 8 - 24 UNF | 9.931 | 9.754 | 9.89 |
| STI M16 × 1.5 | 16.561 | 16.325 | 16.50 | STI | 7/16 - 14 UNC | 11.783 | 11.507 | 11.7 |
| STI M18 × 2.5 | 18.897 | 18.542 | 18.8 | STI | 7/16 - 20 UNF | 11.584 | 11.387 | 11.53 |
| STI M18 × 1.5 | 18.561 | 18.325 | 18.50 | STI | 1/ 2 - 13 UNC | 13.393 | 13.122 | 13.3 |
| STI M20 × 2.5 | 20.897 | 20.542 | 20.8 | STI | 1/ 2 - 20 UNF | 13.172 | 12.975 | 13.12 |
| STI M20 × 1.5 | 20.561 | 20.325 | 20.50 | STI | 5/ 8 - 11 UNC | 16.672 | 16.376 | 16.60 |
| STI M22 × 2.5 | 22.897 | 22.542 | 22.8 | STI | 5/ 8 - 18 UNF | 16.385 | 16.180 | 16.33 |
| STI M22 × 1.5 | 22.561 | 22.325 | 22.50 | STI | 3/4 - 10 UNC | 19.908 | 19.599 | 19.8 |
| STI M24 × 3 | 25.049 | 24.649 | 24.9 | STI | 3/4 - 16 UNF | 19.608 | 19.393 | 19.55 |
| STI M24 × 2 | 24.733 | 24.433 | 24.7 | |||||
| STI M24 × 1.5 | 24.561 | 24.325 | 24.50 |
Technical Inf