FS2650 SAE# 520501 SAE J1453 O-Ring Face Seal (ORFS) Face Seal Union Cross steel fittings
| PART | TUBE | A1 | A2 | A3 | A4 | A1 | A2 | A3 | A4 | Ml | M2 | M3 | M4 | JJ |
| NO.SIZE | O.D. | THREAD | THREAD | THREAD | THREAD | DRILL | DRILL | DRILL | DRILU_ | GTH_ | GTH_ | GTH_ | GTH | FLATS |
| FS2650-04-04-04-04-FG | 1/4 | 9/16-18 | 9/16-18 | 9/16-18 | 9/16-18 | 0.172 | 0.172 | 0.172 | 0.172 | 0.85 | 0.85 | 0.85 | 0.85 | 0.562 |
| FS2650-06-06-06-06-FG | 3/8 | 11/16-16 | 11/16-16 | 11/16-16 | 11/16-16 | 0.264 | 0.264 | 0.264 | 0.264 | 0.98 | 0.98 | 0.98 | 0.98 | 0.750 |
| FS2650-08-08-08-08-FG | 1/2 | 13/16-16 | 13/16-16 | 13/16-16 | 13/16-16 | 0.378 | 0.378 | 0.378 | 0.378 | 1.10 | 1.10 | 1.10 | 1.10 | 0.750 |
| FS2650-10-10-10-10-FG | 5/8 | 1-14 | 1-14 | 1-14 | 1-14 | 0.484 | 0.484 | 0.484 | 0.484 | 1.31 | 1.31 | 1.31 | 1.31 | 1.062 |
| FS2650-12-12-12-12-FG | 3/4 | 1-3/16-12 | 1-3/16-12 | 1-3/16-12 | 1-3/16-12 | 0.609 | 0.609 | 0.609 | 0.609 | 1.47 | 1.47 | 1.47 | 1.47 | 1.188 |
| FS2650-16-16-16-16-FG | 1 | 1-7/16-12 | 1-7/16-12 | 1-7/16-12 | 1-7/16-12 | 0.811 | 0.811 | 0.811 | 0.811 | 1.64 | 1.64 | 1.64 | 1.64 | 1.438 |
| FS2650-20-20-20-20-FG | 1-1/4 | 1-11/16-12 | 1-11/16-12 | 1-11/16-12 | 1-11/16-12 | 1.024 | 1.024 | 1.024 | 1.024 | 1.76 | 1.76 | 1.76 | 1.76 | 1.625 |
| FS2650-24-24-24-24-FG | 1-1/2 | 2-12 | 2-12 | 2-12 | 2-12 | 1.260 | 1.260 | 1.260 | 1.260 | 1.92 | 1.92 | 1.92 | 1.92 | 1.875 |
Parker KLO-S
