Flat Face O-Ring Seal Fitting Torque Chart

1. Inspect fitting sealing surfaces. They must be free of dirt or defects.

2. Inspect 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 so O-ring is not displaced during assembly.

4. Index angle fittings and tighten by hand pressing joint together to ensure O-ring remains in place.

5. Tighten fitting or nut to torque value shown on the chart per dash size stamped on fitting. Do not allow hoses to twist when tightening fittings.

T6243AD

FLAT FACE O-RING SEAL FITTING TORQUE
Nominal   Thread Swivel Nut
Tube O.D. Dash Size Torque
mm (in.) Size in. N·m (lb-ft)
6.35 0.250 -4 9/16-18 24 18
9.52 0.375 -6 11/16-16 30 22
12.70 0.500 -8 13/16-16 47 35
15.88 0.625 -10 1-14 75 55
19.05 0.750 -12 1 3/16-12 114 84
22.22 0.875 -14 1 3/16-12 114 84
25.40 1.000 -16 1 7/16-12 155 115
31.75 1.250 -20 1 11/16-12 193 142
38.10 1.500 -24 2-12 225 166

 

NOTE: Torque tolerance is +15 -20%.

NXC8,M64675,OR -19-13FEB98-1/1