
Unit:mm Unit:mm
| Major | Pitch Diameter | Minor | Major | Pitch Diameter | Minor |
| Diameter | Diameter | Diameter | Diameter |
Size Class Upper Lower Size Class Upper Lower
| Basic | Tolerance Tolerance Basic | Basic | Basic | Basic | Tolerance Tolerance | Basic | |||||
| Size | Size ( μ m) | ( μ m) | Size | Size | Size | ( μ m) | ( μ m) | Size | |||
| + | + | + | + | ||||||||
| STI M 2.6 ×0.45 | Ⅰb | 3.185 | 2.892 18 | 6 | 2.698 | Ⅰb | 18 | 6 | |||
| STI No. 2 -56 UNC | 2.773 | 2.479 | 2.283 | ||||||||
| Ⅰb | 18 | 6 | GH2 | 25.4 12.7 | |||||||
| STI M 3 | ×0.5 | 3.650 | 3.324 | 3.108 | |||||||
| G3 | 38 | 25 | Ⅰb | 18 | 6 | ||||||
| STI No. 4 -40 UNC | 3.670 | 3.258 | 2.981 | ||||||||
| Ⅰb | 18 | 6 | GH2 | 25.4 12.7 | |||||||
| STI M 4 | ×0.7 | 4.909 | 4.454 | 4.151 | |||||||
| G4 | 51 | 38 | STI No. 4 -48 UNF | Ⅰb | 3.532 | 3.189 | 18 | 6 | 2.958 | ||
| Ⅰb | 18 | 6 | STI No. 5 -40 UNC | Ⅰb | 4.000 | 3.589 | 18 | 6 | 3.312 | ||
| STI M 5 | ×0.8 | 6.039 | 5.519 | 5.173 | |||||||
| G4 | 51 | 38 | Ⅰb | 18 | 6 | ||||||
| STI No. 6 -32 UNC | 4.536 | 4.021 | 3.678 | ||||||||
| Ⅰb | 18 | 6 | GH3 | 38.1 25.4 | |||||||
| STI M 6 | ×1 | 7.299 | 6.649 | 6.216 | |||||||
| G4 | 51 | 38 | STI No. 6 -40 UNF | Ⅰb | 4.330 | 3.919 | 18 | 6 | 3.642 | ||
| Ⅰb | 18 | 6 | Ⅰb | 18 | 6 | ||||||
| STI M 8 | ×1.25 | 9.624 | 8.812 | 8.271 STI No. 8 -32 UNC | 5.197 | 4.681 | 4.338 | ||||
| G4 | 51 | 38 | GH3 | 38.1 25.4 | |||||||
| Ⅰb | 22 | 7 | STI No. 8 -36 UNF | Ⅰb | 5.083 | 4.625 | 18 | 6 | 4.318 | ||
| STI M 10 ×1.5 | 11.948 10.974 | 10.324 | |||||||||
| G5 | 64 | 51 | Ⅰb | 18 | 6 | ||||||
| STI No. 10 -24 UNC | 6.201 | 5.513 | 5.055 | ||||||||
| STI M 10 ×1.25 | Ⅰb | 11.624 10.812 | 18 | 6 10.271 | GH2 | 25.4 12.7 | |||||
| STI M 10 × 1 | Ⅰb | 11.299 10.649 | 18 | 6 10.216 | Ⅰb | 18 | 6 | ||||
| STI No. 10 -32 UNF | 5.857 | 5.341 | 4.998 | ||||||||
| Ⅰb | 22 | 7 | GH2 | 25.4 12.7 | |||||||
| STI M 12 × 1.75 | 14.273 13.136 | 12.379 | |||||||||
| G6 | 76 | 64 | STI No. 12 -24 UNC | Ⅰb | 6.861 | 6.173 | 18 | 6 | 5.716 | ||
| STI M 12 × 1.5 | Ⅰb | 13.948 12.974 | 21 | 7 12.324 | Ⅰb | 22 | 7 | ||||
| STI | 1/4 - 20 UNC | 8.000 | 7.174 | 6.626 | |||||||
| STI M 12 × 1.25 | Ⅰb | 13.624 12.812 | 21 | 7 12.271 | GH3 | 38.1 25.4 | |||||
| STI M 14 × 2 | Ⅰb | 16.598 15.299 | 22 | 7 14.433 | Ⅰb | 18 | 6 | ||||
| STI | 1/4 - 28 UNF | 7.528 | 6.939 | 6.545 | |||||||
| STI M 14 × 1.5 | Ⅰb | 15.948 14.974 | 21 | 7 14.324 | GH2 | 25.4 12.7 | |||||
| STI M 16 × 2 | Ⅰb | 18.598 17.299 | 22 | 7 16.433 | Ⅰb | 22 | 7 | ||||
| STI | 5/16 - 18 UNC | 9.771 | 8.854 | 8.244 | |||||||
| STI M 16 × 1.5 | Ⅰb | 17.948 16.974 | 21 | 7 16.324 | GH3 | 38.1 25.4 | |||||
| STI M 18 × 2.5 | Ⅰb | 21.248 19.624 | 30 | 10 18.542 | STI | 5/16 - 24 UNF Ⅰb | 9.313 | 8.624 | 18 | 6 | 8.167 |
| STI M 18 × 1.5 | Ⅰb | 19.948 18.974 | 24 | 8 18.324 | Ⅰb | 22 | 7 | ||||
| STI | 3/ 8 - 16 UNC | 11.587 10.556 | 9.867 | ||||||||
| STI M 20 × 2.5 | Ⅰb | 23.248 21.624 | 30 | 10 20.542 | GH3 | 38.1 25.4 | |||||
| STI M 20 × 1.5 | Ⅰb | 21.948 20.974 | 24 | 8 20.324 | STI | 3/ 8 - 24 UNF Ⅰb 10.900 10.212 | 18 | 6 | 9.754 | ||
| STI M 22 × 2.5 | Ⅰb | 25.248 23.624 | 30 | 10 22.542 | Ⅰb | 30 | 10 | ||||
| STI | 7/ 16 - 14 UNC | 13.469 12.291 | 11.506 | ||||||||
| STI M 22 × 1.5 | Ⅰb | 23.948 22.974 | 24 | 8 22.324 | GH3 | 38.1 25.4 | |||||
| STI M 24 × 3 | Ⅰb | 27.897 25.948 | 30 | 10 24.649 | Ⅰb | 18 | 6 | ||||
| STI | 7/ 16 - 20 UNF | 12.762 11.937 | 11.388 | ||||||||
| STI M 24 × 1.5 | Ⅰb | 25.948 24.974 | 24 | 8 24.324 | GH3 | 38.1 25.4 | |||||
| Ⅰb | 30 | 10 | |||||||||
| STI | 1/2 - 13 UNC | 15.238 13.968 | 13.122 |
GH3 38.1 25.4
| STI | 1/2 - 20 UNF | Ⅰb 14.350 13.524 | 18 | 6 12.976 | |
| STI | 5/ 8 - 11 UNC | Ⅰb | 18.875 17.376 | 30 | 10 16.376 |
| STI | 5/ 8 - 18 UNF | Ⅰb | 17.708 16.791 | 21 | 7 16.181 |
| STI | 3/4 - 16 UNF | Ⅰb | 21.112 20.081 | 21 | 7 19.392 |
Technical Inf