Select Fittings by NPT Thread Size
NPT Size | Actual Diameter | Threads Per Inch |
1/16" Fittings | 0.3125" | 27 |
1/8" Fittings | 0.405" | 27 |
1/4" Fittings | 0.540" | 18 |
3/8" Fittings | 0.675" | 18 |
1/2" Fittings | 0.840" | 14 |
3/4" Fittings | 1.050" | 14 |
1" Fittings | 1.315" | 11.5 |
1-1/4" Fittings | 1.660" | 11.5 |
1-1/2" Fittings | 1.90" | 11.5 |
2" Fittings | 2.375" | 11.5 |
2-1/2" Fittings | 2.875" | 8 |
3" Fittings | 3.5" | 8 |
4" Fittings | 4.5" | 8 |
NPT Thread Information:
When does 1 Inch never measure 1 Inch? Answer: when we are working with pipe threads.
- NPT is an acronym for National Pipe Thread. NPT threads are tapered. The taper improves joint sealing.
- NPT pipe thread sizes do not correspond to actual inch measurements. For example a 1” NPT Pipe Thread measures 1.315”.
- Coyote Gear staff hopes this information helps people who are new to piping products get the size parts they need.