G1-1/2 vs R1-1/2: specs compared
Updated 05 September 2026.
3
specs differ
G1-1/2 and R1-1/2 differ on 3 specs: designation, thread form, seals on.
| Spec | G1-1/2 | R1-1/2 |
|---|---|---|
| Designation | G1-1/2 | R1-1/2 |
| Major diameter | 47.803 mm | 47.803 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 G1-1/2 and R1-1/2 compare?
G1-1/2 and R1-1/2 differ on 3 specs: designation, thread form, seals on.