1-1/2-11.5NPSH vs R1/16: specs compared
Updated 05 September 2026.
47.7 mm
1-1/2-11.5NPSH wins on major diameter
On major diameter, 1-1/2-11.5NPSH leads: 47.7 mm versus 7.723 mm.
| Spec | 1-1/2-11.5NPSH | R1/16 |
|---|---|---|
| Designation | 1-1/2-11.5NPSH | R1/16 |
| Major diameter | 47.7 mm | 7.723 mm |
| Threads per inch / pitch | 11.5 | 28 |
| Thread form | straight (parallel), 60 degree | tapered, 55 degree |
| Seals on | gasket in the coupling | on the thread flanks with PTFE tape or paste |
Questions and answers
Which has the higher major diameter, 1-1/2-11.5NPSH or R1/16?
On major diameter, 1-1/2-11.5NPSH leads: 47.7 mm versus 7.723 mm.
How do 1-1/2-11.5NPSH and R1/16 compare?
On major diameter, 1-1/2-11.5NPSH leads: 47.7 mm versus 7.723 mm.