G1/2 vs R1/2: specs compared
Updated 05 September 2026.
3
specs differ
G1/2 and R1/2 differ on 3 specs: designation, thread form, seals on.
| Spec | G1/2 | R1/2 |
|---|---|---|
| Designation | G1/2 | R1/2 |
| Major diameter | 20.955 mm | 20.955 mm |
| Threads per inch / pitch | 14 | 14 |
| Thread form | parallel, 55 degree | tapered, 55 degree |
| Seals on | flat washer | on the thread flanks with PTFE tape or paste |
Questions and answers
How do G1/2 and R1/2 compare?
G1/2 and R1/2 differ on 3 specs: designation, thread form, seals on.