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Stratoflex approved aircraft hose shop
- FAA/TSO Approved
- Order 800-433-3564
- Fax 916- 421-5719
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Aircraft Hose Wrench to Hose Size
An easy way of determining the hose diameter is to check the size of the wrench that fits on the hose nut ("B" nut).
Wrench size to hose size
| Hose dash size | wrench size - "B" nut |
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| -3 | 1/2, 7/16, or 9/16 |
| -4 | 9/16 |
| -5 | 5/8 |
| -6 | 11/16 |
| -8 | 7/8 |
| -10 | 1 |
| -12 | 1-1/4 |
Careful - some fittings may use wrench sizes different than this chart. This chart shows the most common or typical wrench
sizes. This is especially true for -3 hoses.
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