Hose Reference Index Chart
| Dash Size | Inside Diameter | Nominal "NW" or "DN" | |
|---|---|---|---|
| in. | mm | ||
| -3 | 3/16 | 4.8 | 4 |
| -4 | 1/4 | 6.3 | 6 |
| -5 | 5/16 | 7.9 | 8 |
| -6 | 3/8 | 9.5 | 10 |
| -8 | 1/2 | 12.7 | 13 |
| -10 | 5/8 | 15.9 | 16 |
| -12 | 3/4 | 19.1 | 20 |
| -16 | 1 | 25.4 | 25 |
| -20 | 1-1/4 | 31.8 | 32 |
| -24 | 1-1/2 | 38.1 | 38 |
| -32 | 2 | 50.8 | 50 |
| Dash Size | Inside Diameter | Nominal "NW" or "DN" | |
|---|---|---|---|
| in. | mm | ||
| -4 | 3/16 | 4.8 | 5 |
| -5 | 1/4 | 6.3 | 6 |
| -6 | 5/16 | 7.9 | 8 |
| -8 | 13/32 | 10.3 | 10 |
| -10 | 1/2 | 12.7 | 12/13 |
| -12 | 5/8 | 15.9 | 16 |
| -16 | 7/8 | 22.2 | 20 |
| -20 | 1-1/16 | 28.6 | 25 |
| -24 | 1-3/8 | 34.9 | 32 |
| -32 | 1-13/16 | 46.0 | 40/50 |
| -40 | 2-3/8 | 60.3 | 60 |
| Dash Size | Inside Diameter | |
|---|---|---|
| in. | mm | |
| -3 | 1/8 | 3.2 |
| -4 | 3/16 | 5.0 |
| -5 | 1/4 | 6.5 |
| -6 | 5/16 | 8.0 |
| -8 | 13/32 | 10.5 |
| -10 | 1/2 | 13.0 |
| -12 | 5/8 | 16.0 |
| -14 | 3/4 | 19.0 |
| -16 | 7/8 | 22.0 |
| -18 | 1 | 25.0 |
| -20 | 1-1/8 | 29.0 |
