Thread Size Chart for AN Fittings
| AN -SAE | Dash Size | Thread Size Per Inch | Thread Size | Threads Per Inch | Female Thread ID (mm) | Male Thread OD(mm) |
|---|---|---|---|---|---|---|
| AN-2 | –2 | 5/16 | 5/16-24 | 24 | 6.7 | 7.9 |
| AN-3 | –3 | 3/8 | 3/8-24 | 24 | 8.3 | 9.5 |
| AN-4 | –4 | 7/16 | 7/16-20 | 20 | 9.9 | 11.1 |
| AN-5 | –5 | 1/2 | 1/2-20 | 20 | 11.5 | 12.7 |
| AN-6 | –6 | 9/16 | 9/16-18 | 18 | 12.7 | 14.3 |
| AN-8 | –8 | 3/4 | 3/4-16 | 16 | 17.5 | 19.1 |
| AN-10 | – 10 | 7/8 | 7/8-14 | 14 | 20.6 | 22.2 |
| AN-12 | –12 | 1-1/16 | 1 1/16-12 | 12 | 24.6 | 27 |
| AN-14 | –14 | 1-3/16 | 1 3/16-12 | 12 | 28.2 | 30.2 |
| AN-16 | –16 | 1-5/16 | 1 5/16-12 | 12 | 31.4 | 33.3 |
| AN-20 | –20 | 1-5/8 | 1 5/8-12 | 12 | 39.3 | 41.3 |
| AN-24 | –24 | 1-7/8 | 1 7/8-12 | 12 | 45.6 | 47.6 |
| AN-32 | –32 | 2-1/2 | 2 1/2-12 | 12 | 61.5 | 63.5 |