
| -RS Threa | d Formi | ng Taps for | Non-Fe | rrous | Mater | ials Overall length L | Thread length ℓ | Thread+Neck length ℓn | Shank length ℓs | Shank dia. Ds | Size of square K | Length of square ℓk |
| Size | Class | Code | Chamfer | L (inch) | ℓ (inch) | ℓn (inch) | ℓs (inch) | Ds (inch) | K (inch) | ℓk (inch) | Lobe | Type |
| 1/2-20UNF | H5 H7 | RSU08N5KENP RSU08N5KENB RSU08N7KENP RSU08N7KENB | 4P 2P 4P 2P | 4.331 | 1.024 | - | 2.205 | 0.367 | 0.275 | 0.437 | 6 | 4 |