Knee with internal thread
| Dimensions | Type | Catalog no |
| 25 x 3/4″ | 122 | 78211223 |
| 25 x 3/4″ GT | 122 | 78211229 |
| 25 x 1″ GT | 122 | 78211220 |
| 32 x 1″ | 122 | 78211224 |
| 32 x 1″ GT | 122 | 78211221 |
| 40 x 1 1/4″ | 122 | 78211221 |
| 50 x 1 1/2″ | 122 | 78211228 |
| 50 x 1 1/2″ GT | 122 | 78211228 |
| 63 x 2″ GT | 122 | 78211227 |