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STANDARD CHARTS AND TABLES
O-Ring Boss Fittings
Table 2-9
Size Code
– 2
– 3
– 4
– 5
– 6
– 8
– 10
– 12
– 14
– 16
– 20
– 24
– 32
830E-1AC
Torque Chart For O-ring Boss Fittings
Tube Size
Threads
(OD)
UNF-2B
0.125
0.312 – 24
0.188
0.375 – 24
0.250
0.438 – 20
0.312
0.500 – 20
0.375
0.562 – 18
0.500
0.750 – 16
0.625
0.875 – 14
0.750
1.062 – 12
0.875
1.188 – 12
1.000
1.312 – 12
1.250
1.625 – 12
1.500
1.875 – 12
2.000
2.500 – 12
STANDARD TIGHTENING TORQUES
Newton
Foot
meters
Pounds
(N·m)
(ft·lb)
4 ± 3
4 ± 2
7 ± 3
5 ± 2
11 ± 4
8 ± 3
14 ± 4
10 ± 3
18 ± 4
13 ± 3
33 ± 7
24 ± 5
43 ± 7
32 ± 5
65 ± 7
48 ± 5
73 ± 7
54 ± 5
98 ± 7
72 ± 5
109 ± 7
80 ± 5
109 ± 7
80 ± 5
130 ± 14
96 ± 10
2-9
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