R2 vs 2-11.5 NPT: specs compared
Updated 05 September 2026.
60.32 mm
2-11.5 NPT wins on major diameter
On major diameter, 2-11.5 NPT leads: 60.32 mm versus 59.614 mm.
| Spec | R2 | 2-11.5 NPT |
|---|---|---|
| Designation | R2 | 2-11.5 NPT |
| Major diameter | 59.614 mm | 60.32 mm |
| Threads per inch / pitch | 11 | 11.5 |
| Thread form | tapered, 55 degree | tapered, 60 degree |
| Seals on | on the thread flanks with PTFE tape or paste | on the thread flanks with PTFE tape |
Questions and answers
Which has the higher major diameter, R2 or 2-11.5 NPT?
On major diameter, 2-11.5 NPT leads: 60.32 mm versus 59.614 mm.
How do R2 and 2-11.5 NPT compare?
On major diameter, 2-11.5 NPT leads: 60.32 mm versus 59.614 mm.