
ANSI ZELX NI PO Spiral Pointed Taps for Nickel Base Alloys
| Size | Class | Code | Chamfer | L (inch) | ℓ (inch) | ℓn (inch) | Ds (inch) | K (inch) | ℓk (inch) | No. of flutes | TYPE |
| 1/2-13UNC | GH5 | Y85551 | 4.5P | 3.375 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 1/2-13UNC | GH7 | Y85581 | 4.5P | 3.375 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 1/2-20UNF | GH3 | Y85522 | 4.5P | 3.375 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 1/2-20UNF | GH5 | Y85552 | 4.5P | 3.375 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 1/2-20UNF | GH7 | Y85582 | 4.5P | 3.375 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 5/8-11UNC | GH3 | Y85525 | 4.5P | 3.812 | 1.083 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 5/8-11UNC | GH5 | Y85555 | 4.5P | 3.812 | 1.083 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 5/8-11UNC | GH7 | Y85585 | 4.5P | 3.812 | 1.083 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 5/8-18UNF | GH3 | Y85526 | 4.5P | 3.812 | 1.083 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 5/8-18UNF | GH5 | Y85556 | 4.5P | 3.812 | 1.083 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 5/8-18UNF | GH7 | Y85586 | 4.5P | 3.812 | 1.083 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 3/4-10UNC | GH3 | Y85527 | 4.5P | 4.25 | 1.201 | - | 0.59 | 0.442 | 0.687 | 3 | 4 |
| 3/4-10UNC | GH5 | Y85557 | 4.5P | 4.25 | 1.201 | - | 0.59 | 0.442 | 0.687 | 3 | 4 |
| 3/4-16UNF | GH3 | Y85528 | 4.5P | 4.25 | 1.201 | - | 0.59 | 0.442 | 0.687 | 3 | 4 |
| 3/4-16UNF | GH5 | Y85558 | 4.5P | 4.25 | 1.201 | - | 0.59 | 0.442 | 0.687 | 3 | 4 |