G1 vs 1-1/2-9NH: specs compared
Updated 05 September 2026.
50.55 mm
1-1/2-9NH wins on major diameter
On major diameter, 1-1/2-9NH leads: 50.55 mm versus 33.249 mm.
| Spec | G1 | 1-1/2-9NH |
|---|---|---|
| Designation | G1 | 1-1/2-9NH |
| Major diameter | 33.249 mm | 50.55 mm |
| Threads per inch / pitch | 11 | 9 |
| Thread form | parallel, 55 degree | straight (parallel), 60 degree |
| Seals on | flat washer or bonded seal on the face | rubber gasket in the female swivel |
Questions and answers
Which has the higher major diameter, G1 or 1-1/2-9NH?
On major diameter, 1-1/2-9NH leads: 50.55 mm versus 33.249 mm.
How do G1 and 1-1/2-9NH compare?
On major diameter, 1-1/2-9NH leads: 50.55 mm versus 33.249 mm.