G3 vs R3: specs compared
Updated 05 September 2026.
3
specs differ
G3 and R3 differ on 3 specs: designation, thread form, seals on.
| Spec | G3 | R3 |
|---|---|---|
| Designation | G3 | R3 |
| Major diameter | 87.884 mm | 87.884 mm |
| Threads per inch / pitch | 11 | 11 |
| Thread form | parallel, 55 degree | tapered, 55 degree |
| Seals on | flat washer or bonded seal on the face | on the thread flanks with PTFE tape or paste |
Questions and answers
How do G3 and R3 compare?
G3 and R3 differ on 3 specs: designation, thread form, seals on.