SAE Face Seal and O-Ring Stud End Fitting Torque Chart—Standard Pressures
N79757-UN-13FEB08
A - Stud Straight and Tube Nut
B - Bulkhead Union and Bulkhead Lock Nut
C - 90° Swivel Elbow and Tube Nut
D - 90° Adjustable Stud Elbow
E - Port Plug
F - Stud End
G - Tube Nut
H - Swivel Nut
I - Lock Nut
SAE Face Seal and O-Ring Stud End Fitting Torque Chart—Standard Pressure-Below 27.6 MPA (4,000 PSI) | |||||||||||||||||
Nominal Tube OD Hose ID | O-Ring Face Seal/ Tube Swivel Nut | Bulkhead Jam Nut TorqueA | O-Ring Straight, Adjustable, and External Port Plug Stud EndsA | ||||||||||||||
Metric Tube OD | Inch Tube OD | Thread Size | Swivel Nut Hex Size | Tube Nut Swivel Nut Torque | Jam Nut Hex Size | Jam Nut Torque | Thread Size | Straight Hex SizeB | Adj Lock Nut Hex Size | Steel or Gray Iron Torque | Aluminum or Brass TorqueC | ||||||
mm | Dash Size | in. | mm | in. | in. | N˙m | lb-ft | N˙m | lb-ft | in. | in. | in. | N·m | lb-ft | N˙m | lb-ft | |
5 | -3 | 0.188 | 4.78 | — | — | — | — | — | — | — | 3/8-24 | 5/8 | 9/16 | 12 | 9 | 8 | 6 |
6 | -4 | 0.250 | 6.35 | 9/16-18 | 11/16 | 16 | 12 | 13/16 | 32 | 24 | 7/16-20 | 5/8 | 5/8 | 16 | 12 | 11 | 8 |
8 | -5 | 0.312 | 7.92 | — | — | — | — | — | — | — | 1/2-20 | 3/4 | 11/16 | 24 | 18 | 16 | 12 |
10 | -6 | 0.375 | 9.53 | 11/16-16 | 13/16 | 24 | 18 | 1 | 42 | 31 | 9/16-18 | 3/4 | 3/4 | 37 | 27 | 25 | 18 |
12 | -8 | 0.500 | 12.70 | 13/16-16 | 15/16 | 50 | 37 | 1-1/8 | 93 | 69 | 3/4-16 | 7/8 | 15/16 | 50 | 37 | 33 | 25 |
16 | -10 | 0.625 | 15.88 | 1-14 | 1-1/8 | 69 | 51 | 1-5/16 | 118 | 87 | 7/8-14 | 1-1/16 | 1-1/16 | 69 | 51 | 46 | 34 |
20 | -12 | 0.750 | 19.05 | 1-3/16-12 | 1-3/8 | 102 | 75 | 1-1/2 | 175 | 129 | 1-1/16-12 | 1-1/4 | 1-3/8 | 102 | 75 | 68 | 50 |
22 | -14 | 0.875 | 22.23 | 1-3/16-12 | — | 102 | 75 | — | 175 | 129 | 1-3/16-12 | 1-3/8 | 1-1/2 | 122 | 90 | 81 | 60 |
25 | -16 | 1.000 | 25.40 | 1-7/16-12 | 1-5/8 | 142 | 105 | 1-3/4 | 247 | 182 | 1-5/16-12 | 1-1/2 | 1-5/8 | 142 | 105 | 95 | 70 |
32 | -20 | 1.25 | 31.75 | 1-11/16-12 | 1-7/8 | 190 | 140 | 2 | 328 | 242 | 1-5/8-12 | 1-3/4 | 1-7/8 | 190 | 140 | 127 | 93 |
38 | -24 | 1.50 | 38.10 | 2-12 | 2-1/4 | 217 | 160 | 2-3/8 | 374 | 276 | 1-7/8-12 | 2-1/8 | 2-1/8 | 217 | 160 | 145 | 107 |
50.8 | -32 | 2.000 | 50.80 | — | — | — | — | — | — | — | 2-1/2-12 | 2-3/4 | 2-3/4 | 311 | 229 | 207 | 153 |
A Tolerance is +15%, minus 20% of mean tightening torque unless otherwise specified. | |||||||||||||||||
B The straight hex wrench sizes listed apply to connectors only and may not be the same as the corresponding plug of the same thread size. | |||||||||||||||||
C These torques were established using steel plated connectors in aluminum and brass. | |||||||||||||||||
OUO1073,00022DE-19-20080829 |