R2 vs 2-1/2-7.5NH: 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 59.614 mm.
| Spec | R2 | 2-1/2-7.5NH |
|---|---|---|
| Designation | R2 | 2-1/2-7.5NH |
| Major diameter | 59.614 mm | 77.94 mm |
| Threads per inch / pitch | 11 | 7.5 |
| Thread form | tapered, 55 degree | straight (parallel), 60 degree |
| Seals on | on the thread flanks with PTFE tape or paste | rubber gasket in the female swivel |
Questions and answers
Which has the higher major diameter, R2 or 2-1/2-7.5NH?
On major diameter, 2-1/2-7.5NH leads: 77.94 mm versus 59.614 mm.
How do R2 and 2-1/2-7.5NH compare?
On major diameter, 2-1/2-7.5NH leads: 77.94 mm versus 59.614 mm.