
ANSI SP STI Spiral Fluted Taps for Helical Coil Wire Screw Thread Inserts
| Size | Class | Code | Chamfer | L (inch) | ℓ (inch) | ℓn (inch) | ℓs (inch) | Ds (inch) | K (inch) | ℓk (inch) | No. of flutes | TYPE |
| 1/4-28UNF | GH3 | SUU04K3NEB | 2P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 3 | 2 |
| 5/16-18UNC | GH2 | SUU05O2NEB | 2P | 3.937 | 0.906 | 1.535 | 2.067 | 0.381 | 0.286 | 0.437 | 3 | 2 |
| 5/16-18UNC | GH3 | SUU05O3NEB | 2P | 3.937 | 0.906 | 1.535 | 2.067 | 0.381 | 0.286 | 0.437 | 3 | 2 |
| 5/16-24UNF | GH2 | SUU05M2NEB | 2P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 3 | 2 |
| 5/16-24UNF | GH3 | SUU05M3NEB | 2P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 3 | 2 |
| 3/8-16UNC | GH2 | SUU06P2NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.367 | 0.275 | 0.437 | 3 | 3 |
| 3/8-16UNC | GH3 | SUU06P3NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.367 | 0.275 | 0.437 | 3 | 3 |
| 3/8-24UNF | GH2 | SUU06M2NEB | 2P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 3 | 3 |
| 3/8-24UNF | GH3 | SUU06M3NEB | 2P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 3 | 3 |
| 7/16-14UNC | GH2 | SUU07Q2NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.429 | 0.322 | 0.5 | 3 | 3 |
| 7/16-14UNC | GH3 | SUU07Q3NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.429 | 0.322 | 0.5 | 3 | 3 |
| 7/16-20UNF | GH2 | SUU07N2NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.429 | 0.322 | 0.5 | 3 | 3 |
| 7/16-20UNF | GH3 | SUU07N3NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.429 | 0.322 | 0.5 | 3 | 3 |
| 1/2-13UNC | GH2 | SUU08R2NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.48 | 0.36 | 0.562 | 3 | 3 |
| 1/2-13UNC | GH3 | SUU08R3NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.48 | 0.36 | 0.562 | 3 | 3 |
| 1/2-20UNF | GH2 | SUU08N2NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.48 | 0.36 | 0.562 | 3 | 3 |
| 1/2-20UNF | GH3 | SUU08N3NEB | 2P | 4.331 | 1.024 | - | 2.205 | 0.48 | 0.36 | 0.562 | 3 | 3 |