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

hHeight of threadThread 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"33.400.452.2130.8310.1631.4617.3431.916.6330.417.6625.0112.9331.631.77

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)