R3/4 vs 3/4-14NPSH: specs compared
Updated 05 September 2026.
26.441 mm
R3/4 wins on major diameter
On major diameter, R3/4 leads: 26.441 mm versus 26.29 mm.
| Spec | R3/4 | 3/4-14NPSH |
|---|---|---|
| Designation | R3/4 | 3/4-14NPSH |
| Major diameter | 26.441 mm | 26.29 mm |
| Threads per inch / pitch | 14 | 14 |
| Thread form | tapered, 55 degree | straight (parallel), 60 degree |
| Seals on | on the thread flanks with PTFE tape or paste | flat washer or gasket in the coupling |
Questions and answers
Which has the higher major diameter, R3/4 or 3/4-14NPSH?
On major diameter, R3/4 leads: 26.441 mm versus 26.29 mm.
How do R3/4 and 3/4-14NPSH compare?
On major diameter, R3/4 leads: 26.441 mm versus 26.29 mm.