ASME B1.20.1 (NPT)

DO.D of pipe
nThreads / mm.
PPitch of thread
E0Pitch diam. at beginning of external thread
L1Length of handtight engagement
E1Diam. of handtight engagement
L2Length of effective thread, external
E2Diam. of effective thread, external
L3Length of wrench makeup, internal
E3Diam. of wrench makeup, internal
VVanish thread
L4Overall length external thread
L5Length of nominal complete external threads
E5Diam. of nominal complete external threads
h

Height of thread

Thread taper angle 1" 47'

SIZEDnPE0L1E1L2E2L3E3VL4L5E5h
1/4"13.720.711.4112.135.7912.4910.2112.764.2311.864.9015.107.3812.591.13
3/8"17.150.711.4115.556.1015.9310.3616.194.2315.284.9015.267.5416.021.13
1/2"21.340.551.8119.268.1319.7713.5620.115.4418.926.2919.859.9319.881.45
3/4"26.670.551.8124.588.6125.1213.8625.455.4424.246.2920.1510.2325.221.45
1"33.400.45

2.21

30.8310.1631.4617.3431.916.6330.417.6625.0112.9331.631.77
1 1/4"42.160.452.2139.5510.6740.2217.9540.676.6339.147.6625.6313.5440.401.77
1 1/2"48.260.452.2145.6210.6746.2918.3846.776.6345.217.6626.0413.9646.491.77
2"60.330.452.2157.6311.0758.3319.2258.836.6357.227.6626.8814.8058.561.77

Dimensions are in (mm)