Fittings with one end of the compression fitting, one end of the internal thread / internal wire / internal threaded fittings, mainly used for connecting the pipe with the same nominal diameter and internal thread / internal wire / internal teeth of the external components.
| NO. | Diameter/mm | Thickness/ mm |
| 1 | 15×1/2" | 1.5 |
| 2 | 15×3/4" | 1.5 |
| 3 | 18×1/2" | 1.5 |
| 4 | 18×3/4" | 1.5 |
| 5 | 22×1/2" | 1.5 |
| 6 | 22×3/4" | 1.5 |
| 7 | 28×3/4" | 1.5 |
| 8 | 28×1 | 1.5 |
| 9 | 35×1 | 1.5 |
| 10 | 35×11/4" | 1.5 |
| 11 | 42×11/4" | 1.5 |
| 12 | 42×11/2" | 1.5 |
| 13 | 54×11/2" | 1.5 |
| 14 | 54×2 | 1.5 |
