| Tube OD | End Size | Tube OD | End Size | SAE / MSStraight Thread | SAE / MSStraight Thread | L1 | L2 | A/F-1 | A/F-2 | Dawsons-TechPart No. |
| A | B |
| Inch | Metric | UN / UNF | UN / UNF | mm | mm | Inch | Inch | Inch | Metric |
| 3/16 | 3/16 | - | - | 3/8 x 24 | 3/8 x 24 | 21.1 | 25.4 | 7/16 | 7/16 | 37SNE-3-3 | - |
| 1/4 | 1/4 | 6 | 6 | 7/16 x 20 | 7/16 x 20 | 22.6 | 25.4 | 7/16 | 9/16 | 37SNE-4-4 | 37SNE-6M-6M |
| 5/16 | 5/16 | 8 | 8 | 1/2 x 20 | 1/2 x 20 | 24.1 | 26.9 | 9/16 | 5/8 | 37SNE-5-5 | 37SNE-8M-8M |
| 3/8 | 3/8 | 10 | 10 | 9/16 x 18 | 9/16 x 18 | 26.9 | 31.8 | 9/16 | 11/16 | 37SNE-6-6 | 37SNE-10M-10M |
| 1/2 | 1/2 | 12 | 12 | 3/4 x 16 | 3/4 x 16 | 31.8 | 35.0 | 3/4 | 7/8 | 37SNE-8-8 | 37SNE-12M-12M |
| 5/8 | 5/8 | 16 | 16 | 7/8 x 14 | 7/8 x 14 | 36.8 | 41.2 | 7/8 | 1 | 37SNE-10-10 | 37SNE-16M-16M |
| 3/4 | 3/4 | 18 | 18 | 1-1/16 x 12 | 1-1/16 x 12 | 42.2 | 44.5 | 1-1/16 | 1-1/4 | 37SNE-12-12 | 37SNE-18M-18M |
| 7/8 | 7/8 | 20 | 20 | 1-3/16 x 12 | 1-3/16 x 12 | 46.0 | 45.2 | 1-5/16 | 1-3/8 | 37SNE-14-14 | 37SNE-20M-20M |
| 1 | 3/4 | 25 | 18 | 1-5/16 x 12 | 1-1/16 x 12 | 46.0 | 47.5 | 1-5/16 | 1-1/4 | 37SNE-16-12 | 37SNE-25M-18M |
| 1 | 1 | 25 | 25 | 1-5/16 x 12 | 1-5/16 x 12 | 46.0 | 50.1 | 1-5/16 | 1-1/2 | 37SNE-16-16 | 37SNE-25M-25M |
Dimensions are for reference only and are subject to change.
