Adapter fitting (female thread) is a pipe connector, used to convert or articulate different specifications, types of threaded interfaces, through the internal thread structure to achieve sealing fastening, commonly used in water and gas systems, industrial equipment and other pipeline docking scenarios.
| 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 | 28×1 | 1.5 |
| 8 | 35×11/4" | 1.5 |
| 9 | 42×11/2" | 1.5 |
| 10 | 54×2 | 1.5 |
