3-1/2-6NH vs G3/8: 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 16.662 mm.
| Spec | 3-1/2-6NH | G3/8 |
|---|---|---|
| Designation | 3-1/2-6NH | G3/8 |
| Major diameter | 107.77 mm | 16.662 mm |
| Threads per inch / pitch | 6 | 19 |
| Thread form | straight (parallel), 60 degree | parallel, 55 degree |
| Seals on | rubber gasket in the female swivel | flat washer or bonded seal on the face |
Questions and answers
Which has the higher major diameter, 3-1/2-6NH or G3/8?
On major diameter, 3-1/2-6NH leads: 107.77 mm versus 16.662 mm.
How do 3-1/2-6NH and G3/8 compare?
On major diameter, 3-1/2-6NH leads: 107.77 mm versus 16.662 mm.