G3 vs 3-1/2-6NH: specs compared
Updated 05 September 2026.
107.77 mm
3-1/2-6NH wins on major diameter
On major diameter, 3-1/2-6NH leads: 107.77 mm versus 87.884 mm.
| Spec | G3 | 3-1/2-6NH |
|---|---|---|
| Designation | G3 | 3-1/2-6NH |
| Major diameter | 87.884 mm | 107.77 mm |
| Threads per inch / pitch | 11 | 6 |
| 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, G3 or 3-1/2-6NH?
On major diameter, 3-1/2-6NH leads: 107.77 mm versus 87.884 mm.
How do G3 and 3-1/2-6NH compare?
On major diameter, 3-1/2-6NH leads: 107.77 mm versus 87.884 mm.