
| or eca o | r | rea Major Diameter | nsers, Pitch | erc Diamet U | reas er L | Unit:mm Minor Diameter | or eca o | re | rea ns Major Diameter | ers, n Pitch | e Diame U | reas ter L | Unit:mm Minor Diameter |
| Size | Class | Basic Size | Basic Size T | pper olerance ( μ m) + | ower Tolerance ( μ m) + | Basic Size | Size | Class | Basic Size | Basic Size | pper Tolerance ( μ m) + | ower Tolerance ( μ m) + | Basic Size |
| STI M 2.6×0.45 | Ⅰb | 3.185 | 2.892 | 18 | 6 | 2.698 | STI No.2-56UNC | Ⅰb | 2.773 | 2.479 | 18 | 6 | 2.283 |
| Ⅰb | 18 | 6 | GH2 | 25.4 | 12.7 | ||||||||
| STI M 3 ×0.5 | G3 | 3.650 | 3.324 | 38 | 25 | 3.108 | 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 | G4 | 4.909 | 4.454 | 51 | 38 | 4.151 | STI No. 4 -48 UNF | Ⅰb | 3.532 | 3.189 | 18 | 6 | 2.958 |
| STIM5 ×08 | Ⅰb | 6039 | 5519 | 18 | 6 | 5173 | STI No. 5 -40 UNC | Ⅰb | 4.000 | 3.589 | 18 | 6 | 3.312 |
| . | 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 | G4 | 7.299 | 6.649 | 51 | 38 | 6.216 | STI No. 6 -40 UNF | Ⅰb | 4.330 | 3.919 | 18 | 6 | 3.642 |
| STI M 8 ×1.25 | Ⅰb G4 | 9.624 | 8.812 | 18 51 | 6 38 | 8.271 | STI No. 8 -32 UNC | Ⅰb GH3 | 5.197 | 4.681 | 18 38.1 | 6 25.4 | 4.338 |
| STI M 10 ×1.5 | Ⅰb | 11.948 | 10.974 | 22 | 7 | 10.324 | STI No. 8 -36 UNF | Ⅰb | 5.083 | 4.625 | 18 | 6 | 4.318 |
| G5 | 64 | 51 | Ⅰb | 18 | 6 | ||||||||
| STI M 10 ×1.25 | Ⅰb | 11.624 | 10.812 | 18 | 6 | 10.271 | STI No. 10 -24 UNC | GH2 | 6.201 | 5.513 | 25.4 | 12.7 | 5.055 |
| STI M 10 ×1 | Ⅰb | 11.299 | 10.649 | 18 | 6 | 10.216 | STI No 10 -32UNF | Ⅰb | 5857 | 5341 | 18 | 6 | 4998 |
| Ⅰb | 22 | 7 | . | GH2 | . | . | 25.4 | 12.7 | . | ||||
| STI M 12 ×1.75 | G6 | 14.273 | 13.136 | 76 | 64 | 12.379 | 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 | 1 | Ⅰb | 22 | 7 | |||
| STI M 12 ×1.25 | Ⅰb | 13.624 | 12.812 | 21 | 7 | 12.271 | STI /4- 20 UNC | GH3 | 8.000 | 7.174 | 38.1 | 25.4 | 6.626 |
| STI M 14 ×2 | Ⅰb | 16.598 | 15.299 | 22 | 7 | 14.433 | 1 | Ⅰb | 18 | 6 | |||
| STI M 14 ×1.5 | Ⅰb | 15.948 | 14.974 | 21 | 7 | 14.324 | STI /4- 28 UNF | GH2 | 7.528 | 6.939 | 25.4 | 12.7 | 6.545 |
| STI M 16 ×2 | Ⅰb | 18.598 | 17.299 | 22 | 7 | 16.433 | 5 | Ⅰb | 22 | 7 | |||
| STI M 16 ×1.5 | Ⅰb | 17.948 | 16.974 | 21 | 7 | 16.324 | STI /16- 18 UNC | GH3 | 9.771 | 8.854 | 38.1 | 25.4 | 8.244 |
| 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 M 20×2.5 | Ⅰb | 23.248 | 21.624 | 30 | 10 | 20.542 | STI 3/8- 16 UNC | GH3 | 11.587 | 10.556 | 38.1 | 25.4 | 9.867 |
| 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 | STI 7/16- 14 UNC | Ⅰb | 13469 | 12291 | 30 | 10 | 11506 |
| 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 M 24 ×1.5 | Ⅰb | 25.948 | 24.974 | 24 | 8 | 24.324 | STI 7/16- 20 UNF | GH3 | 12.762 | 11.937 | 38.1 | 25.4 | 11.388 |
| Ⅰb | 30 | 10 | |||||||||||
| STI 1/2- 13 UNC | GH3 | 15.238 | 13.968 | 38.1 | 25.4 | 13.122 | |||||||
| 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