GENERAL
I-12
Joints for Piping
Joints for Piping (O-ring Seal Type)
Nominal Thread
Diameter
(R)
Torque
Steel Cast Steel
N·m ft-lb N·m ft-lb
1/8 11.8 ±1.2 8.7 ±0.8 10.8 ±1.1 8.0 ±0.7
1/4 29.4 ±2.9 21.7 ±2.1 24.5 ±2.5 18.1 ±1.7
3/8 53.9 ±5.4 39.8 ±3.9 49 ±4.9 36.2 ±3.5
1/2 88.3 ±8.8 65.1 ±6.4 73.5 ±7.4 54.3 ±5.3
3/4 147.1 ±14.7 108.5 ±10.7 127.5 ±12.7 94.1 ±9.3
1 196.1 ±19.2 144.7 ±14.3 171.6 ±17.2 126.6 ±12.5
Nominal Thread
Diameter
(G)
Torque
N·m ft-lb
1/8 19.6 ±2.0 14.5 ±1.4
1/4 34.3 ±4.9 25.3 ±3.5
3/8 53.9 ±4.9 39.8 ±3.5
1/2 63.7 ±4.9 47.0 ±3.5
3/4 93.2 ±4.9 68.7 ±3.5
1 107.9 ±9.8 79.5 ±7.2
1-1/4 117.7 ±9.8 86.8 ±7.2
1-1/2 137.3 ±9.8 101.2 ±7.2
Nominal Thread
Diameter
(UNF)
Torque
N·m ft-lb
7/16–20 16.7 ±2.0 12.3 ±1.4
1/2–20 22.6 ±2.0 16.6 ±1.4
9/16–18 31.4 ±2.9 23.1 ±2.1
3/4–16 59.8 ±4.9 44.1 ±3.5
1-1/16–12 102.0 ±5.9 75.2 ±4.4
1-5/16–12 135.3 ±7.8 99.8 ±5.8
1-5/8–12 181.4 ±9.8 133.8 ±7.2
O-RING
Y2-A110