G2-1/2 vs R2-1/2: specs compared
Updated 05 September 2026.
3
specs differ
G2-1/2 and R2-1/2 differ on 3 specs: designation, thread form, seals on.
| Spec | G2-1/2 | R2-1/2 |
|---|---|---|
| Designation | G2-1/2 | R2-1/2 |
| Major diameter | 75.184 mm | 75.184 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 G2-1/2 and R2-1/2 compare?
G2-1/2 and R2-1/2 differ on 3 specs: designation, thread form, seals on.