| oll Tap | | | | | | Overall length L | Thread length ℓ | Thread+Neck length ℓn | Shank length ℓs | Shank dia. Ds | Size of square K | Length of square ℓk |
| N-RZ Threa | d Form | ing Taps for | Steels | | | | | | | | | |
| Size | Class | Code | Chamfer | L (inch) | ℓ (inch) | ℓn (inch) | ℓs (inch) | Ds (inch) | K (inch) | ℓk (inch) | Lobe | Type |
| No.10-24UNC | H6 | RSUNAM6HEXP RSUNAM6HEXB | 4P 2P | 2.756 | 0.551 | 0.984 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.10-32UNF | H4 H6 | RSUNAJ4HEXP RSUNAJ4HEXB RSUNAJ6HEXP RSUNAJ6HEXB | 4P 2P 4P 2P | 2.756 | 0.551 | 0.984 | 1.654 | 0.194 | 0.152 | 0.25 | 4 | 2 |
| No.12-24UNC | H4 H6 | RSUNCM4HEXP RSUNCM4HEXB RSUNCM6HEXP RSUNCM6HEXB | 4P 2P 4P 2P | 3.15 | 0.591 | 0.984 | 1.929 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| No.12-28UNF | H4 H6 | RSUNCK4HEXP RSUNCK4HEXB RSUNCK6HEXP RSUNCK6HEXB | 4P 2P 4P 2P | 3.15 | 0.591 | 0.984 | 1.929 | 0.22 | 0.165 | 0.281 | 4 | 2 |
| 1/4-20UNC | H4 H6 | RSU04N4HEXP RSU04N4HEXB RSU04N6HEXP RSU04N6HEXB | 4P 2P 4P 2P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 1/4-28UNF | H4 H6 | RSU04K4HEXP RSU04K4HEXB RSU04K6HEXP RSU04K6HEXB | 4P 2P 4P 2P | 3.15 | 0.591 | 1.181 | 1.713 | 0.255 | 0.191 | 0.312 | 4 | 2 |
| 5/16-18UNC | H5 H7 | RSU05O5HEXP RSU05O5HEXB RSU05O7HEXP RSU05O7HEXB | 4P 2P 4P 2P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 5/16-24UNF | H5 H7 | RSU05M5HEXP RSU05M5HEXB RSU05M7HEXP RSU05M7HEXB | 4P 2P 4P 2P | 3.543 | 0.748 | 1.378 | 1.831 | 0.318 | 0.238 | 0.375 | 6 | 3 |
| 3/8-16UNC | H5 H7 | RSU06P5HEXP RSU06P5HEXB RSU06P7HEXP RSU06P7HEXB | 4P 2P 4P 2P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 3/8-24UNF | H5 H7 | RSU06M5HEXP RSU06M5HEXB RSU06M7HEXP RSU06M7HEXB | 4P 2P 4P 2P | 3.937 | 0.906 | 1.535 | 2.028 | 0.381 | 0.286 | 0.437 | 6 | 3 |
| 7/16-14UNC | H5 H7 | RSU07Q5HEXP RSU07Q5HEXB RSU07Q7HEXP RSU07Q7HEXB | 4P 2P 4P 2P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 8 | 4 |
| 7/16-20UNF | H5 H7 | RSU07N5HEXP RSU07N5HEXB RSU07N7HEXP RSU07N7HEXB | 4P 2P 4P 2P | 3.937 | 0.906 | - | 2.008 | 0.323 | 0.242 | 0.406 | 8 | 4 |
| 1/2-13UNC | H5 H7 | RSU08R5HEXP RSU08R5HEXB RSU08R7HEXP RSU08R7HEXB | 4P 2P 4P 2P | 4.331 | 1.024 | - | 2.205 | 0.367 | 0.275 | 0.437 | 8 | 4 |