2-1/2-7.5NH vs 2-1/2-8NPSH: specs compared
Updated 05 September 2026.
77.94 mm
2-1/2-7.5NH wins on major diameter
On major diameter, 2-1/2-7.5NH leads: 77.94 mm versus 72.16 mm.
| Spec | 2-1/2-7.5NH | 2-1/2-8NPSH |
|---|---|---|
| Designation | 2-1/2-7.5NH | 2-1/2-8NPSH |
| Major diameter | 77.94 mm | 72.16 mm |
| Threads per inch / pitch | 7.5 | 8 |
| Thread form | straight (parallel), 60 degree | straight (parallel), 60 degree |
| Seals on | rubber gasket in the female swivel | gasket in the coupling |
Questions and answers
Which has the higher major diameter, 2-1/2-7.5NH or 2-1/2-8NPSH?
On major diameter, 2-1/2-7.5NH leads: 77.94 mm versus 72.16 mm.
How do 2-1/2-7.5NH and 2-1/2-8NPSH compare?
On major diameter, 2-1/2-7.5NH leads: 77.94 mm versus 72.16 mm.