Skip Navigation Links.
Thread dimensions for NPT threads ANSI B 1.20.1
Thread Ø d2
mm
Ø d3
mm
Ø p
mm
3/8" 16.717.0+0.21.14
1/2" 21.021.3+0.21.18
3/4" 26.426.7+0.21.18
1" 33.333.6+0.22.21
1 1/4" 41.942.2+0.22.21
1 1/2" 47.848.1+0.32.21
2" 59.859.9+0.32.21
     
Ø d1Core diameter   
Ø d2Exterior diameter   
Ø d3hole diameter   
Ø ppitch   
Dimensional drawing