Pipe Thread Torque
Pipe Thread Size
NPTF
T.F.F.T.
(Turns From Finger Tight)
1/8 - 27 2 - 3
1/4 - 18 2 - 3
3/8 - 18 2 - 3
1/2 -14 2 - 3
3/4 - 14 2 - 3
1 - 11-1/2  
1 - 11-1/4  1.5 - 2.5
1 - 11-1/2 1.5 - 2.5
2 - 11-1/2 1.5 - 2.5


Size in-lbs Newtons-m
1/16" 5.0 0.57
1/8" 7.0 0.79
1/4" 16 1.81
3/8" 23 2.60
1/2" 30 3.39
3/4" 54 6.10
1" 78 8.81
Brass Flare Size Brass Flare Size Recommended Seating Torque for Brass Flare Nuts
1/4 8 -­‐ 10 Ft. -­‐ Lbs.
3/8 15 -­‐ 18 Ft. -­‐ Lbs.
1/2 28 -­‐ 32 Ft. -­‐ Lbs.
5/8 38 -­‐ 42 Ft. -­‐ Lbs.
3/4 50 -­‐ 55 Ft. -­‐ Lbs.
Pipe Thread Illustration
Pipe Size Schedule Chart
National Standard Taper Pipe Threads NPT Chart
Fluid Flow Engineering and Design Resoures
Hydraulic, Pneumatic Engineering & Design
Schedule 40 Steel Pipe Sizes & Dimensions ANSI
Schedule 80 Steel Pipe Sizes & Dimensions ANSI
Standard Size Steel Pipe Weights With Contents Calculator