Tube End Nut
| Tube OD | SAE / MSStraight Thread | L | A/F | Dawsons-TechPart No. | ||
| B | ||||||
| Inch | Metric | UN / UNF | mm | Inch | Inch | Metric |
| 1/8 | - | 5/16 x 24 | 13.7 | 3/8 | 37N-2 | - |
| 3/16 | - | 3/8 x 24 | 15.2 | 7/16 | 37N-3 | - |
| 1/4 | 6 | 7/16 x 20 | 15.5 | 9/16 | 37N-4 | 37N-6M |
| 5/16 | 8 | 1/2 x 20 | 17.0 | 5/8 | 37N-5 | 37N-8M |
| 3/8 | 10 | 9/16 x 18 | 18.3 | 11/16 | 37N-6 | 37N-10M |
| 1/2 | 12 | 3/4 x 16 | 21.3 | 7/8 | 37N-8 | 37N-12M |
| 5/8 | 16 | 7/8 x 14 | 24.6 | 1 | 37N-10 | 37N-16M |
| 3/4 | 18 | 1-1/16 x 12 | 25.9 | 1-1/4 | 37N-12 | 37N-18M |
| - | 20 | 1-1/16 x 12 | 25.9 | 1-1/4 | - | 37N-20M |
| 7/8 | - | 1-3/16 x 12 | 27.4 | 1-3/8 | 37N-14 | - |
| 1 | 25 | 1-5/16 x 12 | 28.4 | 1-1/2 | 37N-16 | 37N-25M |