ISO Certificate 9001:2015

Coupling Pipe Fittings

Hex Coupling
Hex Nipple

NPT

NPT Size in. Dimensions mm
A E F
1/8 20.6 8.6 14.3
1/4 30.2 11.4 19.1
3/8 33.3 15 22.2
1/2 39.6 18.5 27
3/4 41.1 23.9 33.3
1 50.8 29.7 41.3
Heavy-Wall Female NPT
1/4 30.2 11.4 25
1/2 39.6 18.5 38.1

 

ISO Tapered Thread (RT)

ISO Thread Size in. Dimensions mm
A E F
1/8 20.6 8.4 14.3
1/4 30.2 11.2 19.1
3/8 33.3 14.7 22.2
1/2 39.6 18.3 27

 

Reducing Coupling
Hex Nipple

NPT

NPT Inlet Size in. NPT Outlet Size in. Dimensions mm
A E F
  1/4   1/8 31 8.6 19.1
  3/8   1/4 35.1 11.4 22.2
  1/2   1/8 39.6 8.6 27
  1/2   1/4 44.4 11.4 27
  1/2   3/8 45.2 15 27
  3/4   1/4 46 11.4 33.3
  3/4   1/2 52.3 18.5 33.3
1        1/2 55.6 18.5 41.3
1        3/4 57.2 23.9 41.3
Heavy-Wall Female NPT
  1/2   1/4 44.4 11.4 38.1

 

ISO Tapered Thread (RT)

NPT Inlet Size in. NPT Outlet Size in. Dimensions mm
A E F
  3/8   1/4 35.1 11.2 22.2
  1/2   1/4 44.4 11.2 27
  1/2   3/8 45.2 14.7 27

 

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