3/4-14 NPT vs G4: specs compared
Updated 05 September 2026.
113.03 mm
G4 wins on major diameter
On major diameter, G4 leads: 113.03 mm versus 26.67 mm.
| Spec | 3/4-14 NPT | G4 |
|---|---|---|
| Designation | 3/4-14 NPT | G4 |
| Major diameter | 26.67 mm | 113.03 mm |
| Threads per inch / pitch | 14 | 11 |
| Thread form | tapered, 60 degree | parallel, 55 degree |
| Seals on | on the thread flanks with PTFE tape | flat washer or bonded seal on the face |
Questions and answers
Which has the higher major diameter, 3/4-14 NPT or G4?
On major diameter, G4 leads: 113.03 mm versus 26.67 mm.
How do 3/4-14 NPT and G4 compare?
On major diameter, G4 leads: 113.03 mm versus 26.67 mm.