R3 vs G3/4: specs compared
Updated 05 September 2026.
87.884 mm
R3 wins on major diameter
On major diameter, R3 leads: 87.884 mm versus 26.441 mm.
| Spec | R3 | G3/4 |
|---|---|---|
| Designation | R3 | G3/4 |
| Major diameter | 87.884 mm | 26.441 mm |
| Threads per inch / pitch | 11 | 14 |
| Thread form | tapered, 55 degree | parallel, 55 degree |
| Seals on | on the thread flanks with PTFE tape or paste | flat washer or bonded seal on the face |
Questions and answers
Which has the higher major diameter, R3 or G3/4?
On major diameter, R3 leads: 87.884 mm versus 26.441 mm.
How do R3 and G3/4 compare?
On major diameter, R3 leads: 87.884 mm versus 26.441 mm.