
| Overall length Thread length | Thread + Neck length | Shank dia. | Size of square | Length of square |
| L ℓ | ℓn | Ds | K | ℓk |
ANSI ZELX NI SP STI Spiral Fluted Taps for Helical Coil Wire Screw Thread Inserts and for Nickel Base Alloys
| Size | Class | Code | Chamfer | L (inch) | ℓ (inch) | ℓn (inch) | Ds (inch) | K (inch) | ℓk (inch) | No. of flutes | TYPE |
| No.10-24UNC | GH2 | Y87412 | 3P | 2.5 | 0.433 | 1 | 0.255 | 0.191 | 0.312 | l 3 | 2 |
| No.10-24UNC | GH2 | Y87012 | 1.5P | 2.5 | 0.433 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| No.10-24UNC | GH3 | Y87428 | 3P | 2.5 | 0.433 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| No.10-24UNC | GH3 | Y87028 | 1.5P | 2.5 | 0.433 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| No.10-24UNC | GH5 | Y87445 | 1.5P | 2.5 | 0.433 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| No.10-32UNF | GH2 | Y87413 | 3P | 2.5 | 0.354 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| No.10-32UNF | GH3 | Y87429 | 3P | 2.5 | 0.354 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| No.10-32UNF | GH3 | Y87029 | 1.5P | 2.5 | 0.354 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| No.10-32UNF | GH5 | Y87057 | 1.5P | 2.5 | 0.354 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| 1/4-20UNC | GH2 | Y87448 | 3P | 2.718 | 0.472 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 1/4-20UNC | GH3 | Y87458 | 3P | 2.718 | 0.472 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 1/4-20UNC | GH3 | Y87058 | 1.5P | 2.718 | 0.472 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 1/4-20UNC | GH5 | Y87090 | 1.5P | 2.718 | 0.472 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 1/4-28UNF | GH2 | Y87449 | 3P | 2.718 | 0.394 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 1/4-28UNF | GH2 | Y87059 | 1.5P | 2.718 | 0.394 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 1/4-28UNF | GH3 | Y87459 | 3P | 2.718 | 0.394 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 1/4-28UNF | GH5 | Y87091 | 1.5P | 2.718 | 0.394 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 5/16-18UNC | GH2 | Y87060 | 1.5P | 2.937 | 0.551 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 5/16-18UNC | GH3 | Y87460 | 3P | 2.937 | 0.551 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 5/16-18UNC | GH4 | Y87470 | 3P | 2.937 | 0.551 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 5/16-24UNF | GH2 | Y87451 | 3P | 2.937 | 0.394 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 5/16-24UNF | GH3 | Y87461 | 3P | 2.937 | 0.394 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 5/16-24UNF | GH3 | Y87061 | 1.5P | 2.937 | 0.394 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 3/8-16UNC | GH3 | Y87462 | 3P | 3.375 | 0.63 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 3/8-16UNC | GH3 | Y87062 | 1.5P | 3.375 | 0.63 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 3/8-16UNC | GH4 | Y87472 | 3P | 3.375 | 0.63 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 3/8-24UNF | GH2 | Y87453 | 3P | 3.156 | 0.472 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 3/8-24UNF | GH2 | Y87063 | 1.5P | 3.156 | 0.472 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 3/8-24UNF | GH3 | Y87463 | 3P | 3.156 | 0.472 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 3/8-24UNF | GH5 | Y87085 | 1.5P | 3.156 | 0.472 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 7/16-14UNC | GH3 | Y87464 | 3P | 3.593 | 0.709 | - | 0.429 | 0.322 | 0.5 | 3 | 4 |
| 7/16-20UNF | GH3 | Y87465 | 3P | 3.375 | 0.472 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 7/16-20UNF | GH3 | Y87065 | 1.5P | 3.375 | 0.472 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 7/16-20UNF | GH4 | Y87475 | 3P | 3.375 | 0.472 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 1/2-13UNC | GH3 | Y87466 | 3P | 3.812 | 0.748 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 1/2-13UNC | GH3 | Y87066 | 1.5P | 3.812 | 0.748 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 1/2-13UNC | GH5 | Y87088 | 1.5P | 3.812 | 0.748 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 1/2-20UNF | GH3 | Y87467 | 3P | 3.593 | 0.512 | - | 0.429 | 0.322 | 0.5 | 3 | 4 |
| 1/2-20UNF | GH3 | Y87067 | 1.5P | 3.593 | 0.512 | - | 0.429 | 0.322 | 0.5 | 3 | 4 |