SAE J512, 45° Flare
SAE J512, 45° Flare
The SAE 45° flare connectors seal in the same manner and are similar to the 37° connectors except for the flare angle. When the straight threads are engaged, the 45° male seat seals on the 45° female flare seat. 45° connectors are commonly found in automotive and refrigeration applications, on brass adapters, and are generally used at lower pressures than 37° JIC connectors. Check the threads and flares carefully to make positive identification.
Guide on how to properly measure threads.
Download our 45° SAE Flare thread profiles for a printable, actual SAE flare size profiles. You will need to have Adobe Reader to view and print the file.
The SAE 45° flare connectors seal in the same manner and are similar to the 37° connectors except for the flare angle. When the straight threads are engaged, the 45° male seat seals on the 45° female flare seat. 45° connectors are commonly found in automotive and refrigeration applications, on brass adapters, and are generally used at lower pressures than 37° JIC connectors. Check the threads and flares carefully to make positive identification.
Guide on how to properly measure threads.
Download our 45° SAE Flare thread profiles for a printable, actual SAE flare size profiles. You will need to have Adobe Reader to view and print the file.
| SAE J512, 45° Flare | ||||||
| Dash Size |
Inch Size |
Thread | Male Thread O.D. mm |
Male Thread O.D. inches |
Female Thread I.D. mm |
Female Thread I.D. inches |
| 2 | 1/8 | 5/16-24 | 7.9 | .31 | 6.9 | .27 |
| 3 | 3/16 | 3/8-24 | 9.6 | .38 | 8.6 | .34 |
| 4 | 1/4 | 7/16-20 | 11.2 | .44 | 9.9 | .39 |
| 5 | 5/16 | 1/2-20 | 12.7 | .50 | 11.4 | .45 |
| 6 | 3/8 | 5/8-18 | 15.7 | .62 | 14.2 | .56 |
| 8 | 1/2 | 3/4-16 | 19.0 | .75 | 17.0 | .67 |
| 10 | 5/8 | 7/8-14 | 22.3 | .88 | 20.3 | .80 |
| 12 | 3/4 | 1-1/16-14 | 26.9 | 1.06 | 25.1 | .99 |
| 14 | 7/8 | 1-¼-12 | 31.7 | 1.25 | 29.5 | 1.16 |
| 16 | 1 | 1-3/8-12 | 35.0 | 1.38 | 32.5 | 1.28 |
