
| Overall length L | Thread length ℓ | Thread+ leng ℓ | Neck th n | Shank length ℓs | Shank dia. Ds | Size of square K | Length of square ℓk | |||||||
| AL-HT Hand | Taps | for Helical | Coil | Basic Wire Scr | ew Th | read I | nserts | |||||||
| Size | Class | Code | Chamfer | major dia (mm) | L (mm) | ℓ (mm) | ℓn (mm) | ℓs (mm) | Ds (mm) | K (mm) | ℓk (mm) | No. of flutes | Type | Stock |
| STI No.12-24UNC | 1b | TWUNCM1LEB5 TWUNCM1LEBA | 5P 1.5P | 6.861 | 70 | 19 | - | 36 | 6.2 | 5 | 8 | 4 | 3 | △ |
| STI 1/4-20UNC | 1b | TWU04N1LEB5 TWU04N1LEBA | 5P 1.5P | 8.000 | 70 | 19 | - | 36 | 6.2 | 5 | 8 | 4 | 3 | △ |
| STI 1/4-28UNF | 1b | TWU04K1LEB5 TWU04K1LEBA | 5P 1.5P | 7.528 | 70 | 19 | - | 36 | 6.2 | 5 | 8 | 4 | 3 | △ |
| STI 5/16-18UNC | 1b | TWU05O1LEB5 TWU05O1LEBA | 5P 1.5P | 9.771 | 75 | 23 | - | 38 | 7 | 5.5 | 8 | 4 | 3 | △ |
| STI 5/16-24UNF | 1b | TWU05M1LEB5 TWU05M1LEBA | 5P 1.5P | 9.313 | 75 | 23 | - | 38 | 7 | 5.5 | 8 | 4 | 3 | △ |
| STI 3/8-16UNC | 1b | TWU06P1LEB5 TWU06P1LEBA | 5P 1.5P | 11.587 | 82 | 26 | - | 42 | 8.5 | 6.5 | 9 | 4 | 3 | △ |
| STI 3/8-24UNF | 1b | TWU06M1LEB5 TWU06M1LEBA | 5P 1.5P | 10.900 | 82 | 26 | - | 42 | 8.5 | 6.5 | 9 | 4 | 3 | △ |
| STI 7/16-14UNC | 1b | TWU07Q1LEB5 TWU07Q1LEBA | 5P 1.5P | 13.469 | 88 | 26 | - | 45 | 10.5 | 8 | 11 | 4 | 3 | △ |
| STI 7/16-20UNF | 1b | TWU07N1LEB5 TWU07N1LEBA | 5P 1.5P | 12.762 | 88 | 26 | - | 45 | 10.5 | 8 | 11 | 4 | 3 | △ |
| STI 1/2-13UNC | 1b | TWU08R1LEB5 TWU08R1LEBA | 5P 1.5P | 15.238 | 95 | 26 | - | 48 | 12.5 | 10 | 13 | 4 | 3 | △ |
| STI 1/2-20UNF | 1b | TWU08N1LEB5 TWU08N1LEBA | 5P 1.5P | 14.350 | 95 | 26 | - | 48 | 12.5 | 10 | 13 | 4 | 3 | △ |
| STI 5/8-11UNC | 1b | TWU10U1LEB5 TWU10U1LEBA | 5P 1.5P | 18.875 | 105 | 33 | - | 50 | 15 | 12 | 15 | 4 | 4 | △ |
| STI 5/8-18UNF | 1b | TWU10O1LEB5 TWU10O1LEBA | 5P 1.5P | 17.708 | 100 | 33 | - | 51 | 14 | 11 | 14 | 4 | 3 | △ |
| STI 3/4-16UNF | 1b | TWU12P1LEB5 TWU12P1LEBA | 5P 1.5P | 21.112 | 115 | 33 | - | 55 | 17 | 13 | 16 | 4 | 4 | △ |