R2-1/2 vs 3-6NH: specs compared
Updated 05 September 2026.
92.02 mm
3-6NH wins on major diameter
On major diameter, 3-6NH leads: 92.02 mm versus 75.184 mm.
| Spec | R2-1/2 | 3-6NH |
|---|---|---|
| Designation | R2-1/2 | 3-6NH |
| Major diameter | 75.184 mm | 92.02 mm |
| Threads per inch / pitch | 11 | 6 |
| 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, R2-1/2 or 3-6NH?
On major diameter, 3-6NH leads: 92.02 mm versus 75.184 mm.
How do R2-1/2 and 3-6NH compare?
On major diameter, 3-6NH leads: 92.02 mm versus 75.184 mm.