
ANSI N-RS Roll Taps for Non-Ferrous Materials
| Size | Class | Code | Chamfe | r L (inch) | ℓ (inch) | ℓn (inch) | ℓs (inch) | Ds (inch) | K (inch) | ℓk (inch) | Lobe | TYPE |
| No.8-36UNF | H3 | 388450M | 2P | 2.48 | 0.512 | 0.827 | 1.535 | 0.168 | 0.131 | 0.25 | 4 | 2 |
| No.8-36UNF | H5 | 388453M | 4P | 2.48 | 0.512 | 0.827 | 1.535 | 0.168 | 0.131 | 0.25 | 4 | 2 |
| No.8-36UNF | H5 | 388451M | 2P | 2.48 | 0.512 | 0.827 | 1.535 | 0.168 | 0.131 | 0.25 | 4 | 2 |
| No.10-24UNC | H4 | 388456M | 4P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.10-24UNC | H4 | 388454M | 2P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.10-24UNC | H6 | 388457M | 4P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.10-24UNC | H6 | 388455M | 2P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.10-32UNF | H4 | 388460M | 4P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.10-32UNF | H4 | 388458M | 2P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.10-32UNF | H6 | 388461M | 4P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.10-32UNF | H6 | 388459M | 2P | 2.756 | 0.551 | 0.945 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.12-24UNC | H4 | 388464M | 4P | 3.15 | 0.591 | 0.984 | 1.953 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| No.12-24UNC | H4 | 388462M | 2P | 3.15 | 0.591 | 0.984 | 1.953 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| No.12-24UNC | H6 | 388465M | 4P | 3.15 | 0.591 | 0.984 | 1.953 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| No.12-24UNC | H6 | 388463M | 2P | 3.15 | 0.591 | 0.984 | 1.953 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| No.12-28UNF | H4 | 388468M | 4P | 3.15 | 0.591 | 0.984 | 1.953 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| No.12-28UNF | H4 | 388466M | 2P | 3.15 | 0.591 | 0.984 | 1.953 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| No.12-28UNF | H6 | 388469M | 4P | 3.15 | 0.591 | 0.984 | 1.953 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| No.12-28UNF | H6 | 388467M | 2P | 3.15 | 0.591 | 0.984 | 1.953 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| 1/4-20UNC | H4 | 388472M | 4P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 1/4-20UNC | H4 | 388470M | 2P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 1/4-20UNC | H6 | 388473M | 4P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 1/4-20UNC | H6 | 388471M | 2P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 1/4-28UNF | H4 | 388476M | 4P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 1/4-28UNF | H4 | 388474M | 2P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 1/4-28UNF | H6 | 388477M | 4P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 1/4-28UNF | H6 | 388475M | 2P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 5/16-18UNC | H5 | 388480M | 4P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 5/16-18UNC | H5 | 388478M | 2P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 5/16-18UNC | H7 | 388481M | 4P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 5/16-18UNC | H7 | 388479M | 2P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 5/16-24UNF | H5 | 388484M | 4P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 5/16-24UNF | H5 | 388482M | 2P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 5/16-24UNF | H7 | 388485M | 4P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 5/16-24UNF | H7 | 388483M | 2P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 3/8-16UNC | H5 | 388488M | 4P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 3/8-16UNC | H5 | 388486M | 2P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 3/8-16UNC | H7 | 388489M | 4P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 3/8-16UNC | H7 | 388487M | 2P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 3/8-24UNF | H5 | 388492M | 4P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 3/8-24UNF | H5 | 388490M | 2P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 3/8-24UNF | H7 | 388493M | 4P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 3/8-24UNF | H7 | 388491M | 2P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 7/16-14UNC | H5 | 388496M | 4P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 6 | 4 |
| 7/16-14UNC | H5 | 388494M | 2P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 6 | 4 |
| 7/16-14UNC | H7 | 388497M | 4P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 6 | 4 |
| 7/16-14UNC | H7 | 388495M | 2P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 6 | 4 |
| 7/16-20UNF | H5 | 388502M | 4P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 6 | 4 |
| 7/16-20UNF | H5 | 388498M | 2P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 6 | 4 |
| 7/16-20UNF | H7 | 388503M | 4P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 6 | 4 |