Service Recommendations for Flat Face O-Ring Seal Fittings1. Inspect the fitting sealing surfaces. They must be free of dirt or defects.2. Inspect the O-ring. It must be free of damage or defects. 3. Lubricate O-rings and install into groove using petroleum jelly to hold in place. 4. Push O-ring into the groove with plenty of petroleum jelly so O-ring is not displaced during assembly. 5. Index angle fittings and tighten by hand pressing joint together to insure O-ring remains in place. 6. Tighten fitting or nut to torque value shown on the chart per dash size stamped on the fitting. Do not allow hoses to twist when tightening fittings. |
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| FLAT FACE O-RING SEAL FITTING TORQUE | |||||||
|---|---|---|---|---|---|---|---|
| Nominal Tube O.D. | Dash Size | Thread Size in. |
Swivel Nut | Bulkhead Nut | |||
| mm | in. | N·m | lb-ft | N·m | lb-ft | ||
| 6.35 | 0.250 | -4 | 9/16-18 | 16 | 12 | 5.0 | 3.5 |
| 9.52 | 0.375 | -6 | 11/16-16 | 24 | 18 | 9.0 | 6.5 |
| 12.70 | 0.500 | -8 | 13/16-16 | 50 | 37 | 17.0 | 12.5 |
| 15.88 | 0.625 | -10 | 1-14 | 69 | 51 | 17.0 | 12.5 |
| 19.05 | 0.750 | -12 | 1-3/16-12 | 102 | 75 | 17.0 | 12.5 |
| 22.22 | 0.875 | -14 | 1-3/16-12 | 102 | 75 | 17.0 | 12.5 |
| 25.40 | 1.000 | -16 | 1-7/16-12 | 142 | 105 | 17.0 | 12.5 |
| 31.75 | 1.250 | -20 | 1-11/16-12 | 190 | 140 | 17.0 | 12.5 |
| 38.10 | 1.500 | -24 | 2-12 | 217 | 160 | 17.0 | 12.5 |
04T,90,K67 -19-01AUG94-1/1 |