Hydraulic NPT fitting comes in a variety of sizes and threads, such as JIC to NPT, NPT to BSP, NPT to metric, and ORFS to NPT thread. Topol Power manufactures a comprehensive range of precision metric adapters to accommodate diverse hydraulic configuration requirements.
| PART NO. | THREAD | DIMENSIONS（INCH） | |||
| A1 | A2 | N | N1 | Y FLATS | |
| 5501-01-02-FG | 1/16-27 | 1/8-27 | 0.64 | 0.64 | 0.438 |
| 5501-02-02-FG | 1/8-27 | 1/8-27 | 0.64 | 0.64 | 0.438 |
| 5501-04-04-FG | 1/4-18 | 1/4-18 | 0.86 | 0.86 | 0.562 |
| 5501-06-06-FG | 3/8-18 | 3/8-18 | 0.95 | 0.95 | 0.75 |
| 5501-08-08-FG | 1/2-14 | 1/2-14 | 1.17 | 1.17 | 0.875 |
| 5501-12-12-FG | 3/4-14 | 3/4-14 | 1.2 | 1.2 | 1.062 |
| 5501-16-16-FG | 1-11 1/2 | 1-11 1/2 | 1.48 | 1.48 | 1.312 |
| 5501-20-20-FG | 1-1/4-11 1/2 | 1-1/4-11 1/2 | 1.67 | 1.67 | 1.625 |
| 5501-24-24-FG | 1-1/2-11 1/2 | 1-1/2-11 1/2 | 1.77 | 1.77 | 1.875 |
