
■ Spiral pointed tap to cut internal threads for helical coil to E enter. Oxide
ow carbon steels
For icon explanation, refer to P.50
Segment:1E
| Size | Class | Code | Chamfe | r L (inch) | ℓ (inch) | ℓn (inch) | ℓs (inch) | Ds (inch) | K (inch) | ℓk (inch) | No. of flutes | Type |
| For Helical Coil Wire S i | crew Thr i | ead Inserts, for i | Unified T | i hreads | l | |||||||
| GH1 | PUUN2E1NEX | |||||||||||
| STI No.2-56UNC | GH2 | PUUN2E2NEX | 5P | 2.205 | 0.354 | 0.709 | 1.28 | 0.141 | 0.11 | 0.187 | 2 | 1 |
| STI No.4-40UNC | GH1 GH2 | PUUN4H1NEX PUUN4H2NEX | 5P | 2.48 | 0.512 | 0.827 | 1.496 | 0.168 | 0.131 | 0.25 | 2 | 1 |
| STI No.6-32UNC | GH1 GH2 | PUUN6J1NEX PUUN6J2NEX | 5P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.131 | 0.25 | 2 | 1 |
| STI No.8-32UNC | GH1 GH2 | PUUN8J1NEX PUUN8J2NEX | 5P | 3.15 | 0.591 | 0.984 | 1.929 | 0.220 | 0.165 | 0.281 | 2 | 1 |
| STI No.10-24UNC | GH2 GH3 | PUUNAM2NEX PUUNAM3NEX | 5P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 2 | 1 |
| STI No.10-32UNF | GH2 GH3 | PUUNAJ2NEX PUUNAJ3NEX | 5P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 2 | 1 |
| STI 1/4-20UNC | GH2 GH3 | PUU04N2NEX PUU04N3NEX | 5P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 2 | 2 |
| STI 1/4-28UNF | GH2 GH3 | PUU04K2NEX PUU04K3NEX | 5P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 2 | 2 |
| STI 5/16-18UNC | GH2 GH3 | PUU05O2NEX PUU05O3NEX | 5P | 3.937 | 0.906 | 1.535 | 2.067 | 0.381 | 0.286 | 0.437 | 2 | 2 |
| STI 5/16-24UNF | GH2 GH3 | PUU05M2NEX PUU05M3NEX | 5P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 2 | 2 |
| STI 3/8-16UNC | GH3 GH4 | PUU06P3NEX PUU06P4NEX | 5P | 4.331 | 1.024 | - | 2.205 | 0.367 | 0.275 | 0.437 | 3 | 3 |
| STI 3/8-24UNF | GH2 GH3 | PUU06M2NEX PUU06M3NEX | 5P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 3 | 3 |