International Measuring and Identification Guide - Inverted Flare SAE J512
| Male | Female | ||
| Nominal | Thread | Thread | Thread |
| Size | Size | O.D. | I.D. |
| 1/8 | 5/16 - 24 | 5/16 | 9/32 |
| 3/16 | 3/8 - 24 | 3/8 | 11/32 |
| 1/4 | 7/16 - 20 | 7/16 | 13/32 |
| 5/16 | 1/2 - 20 | 1/2 | 7/16 |
| 3/8 | 5/8 - 18 | 5/8 | 9/16 |
| 7/16 | 11/16 - 18 | 11/16 | 5/8 |
| 1/2 | 3/4 - 18 | 3/4 | 23/32 |
| 5/8 | 7/8 - 18 | 7/8 | 13/16 |
| 3/4 | 1 1/16 - 16 | 1 1/16 | 1 |
| The seal is made on the flared surfaces. | |||
| The threads retain the connection. | |||