| Female NPTThread Size | Reduced Male NPTThread Size | Dimensions in mm | F-Hex(Inch) | Pressure RatingPSIG (Bar) | Dawsons-TechPart No. |
| P1 | P2 | E | L |
| 1/4 | 1/8 | 4.8 | 32.0 | 3/4 | 6600 (450) | RA-4N-2N |
| 3/8 | 1/8 | 4.8 | 33.8 | 7/8 | 5300 (360) | RA-6N-2N |
| 3/8 | 1/4 | 7.1 | 38.1 | 7/8 | 5300 (360) | RA-6N-4N |
| 1/2 | 1/8 | 4.8 | 40.1 | 1-1/16 | 5200 (354) | RA-8N-2N |
| 1/2 | 1/4 | 7.1 | 44.7 | 1-1/16 | 5200 (354) | RA-8N-4N |
| 1/2 | 3/8 | 9.6 | 44.4 | 1-1/16 | 5200 (354) | RA-8N-6N |
| 3/4 | 1/4 | 7.1 | 47.0 | 1-1/4 | 4300 (292) | RA-12N-4N |
| 3/4 | 3/8 | 9.6 | 46.2 | 1-1/4 | 4300 (292) | RA-12N-6N |
| 3/4 | 1/2 | 11.9 | 51.3 | 1-1/4 | 4300 (292) | RA-12N-8N |
| 1 | 1/4 | 7.1 | 49.8 | 1-5/8 | 4500 (306) | RA-16N-4N |
| 1 | 1/2 | 11.9 | 54.9 | 1-5/8 | 4500 (306) | RA-16N-8N |
| 1 | 3/4 | 15.7 | 55.1 | 1-5/8 | 4500 (306) | RA-16N-12N |
Dimensions are for reference only and are subject to change.
