G1/8 vs 2-11.5 NPT: specs compared
Updated 05 September 2026.
60.32 mm
2-11.5 NPT wins on major diameter
On major diameter, 2-11.5 NPT leads: 60.32 mm versus 9.728 mm.
| Spec | G1/8 | 2-11.5 NPT |
|---|---|---|
| Designation | G1/8 | 2-11.5 NPT |
| Major diameter | 9.728 mm | 60.32 mm |
| Threads per inch / pitch | 28 | 11.5 |
| Thread form | parallel, 55 degree | tapered, 60 degree |
| Seals on | flat washer or bonded seal on the face | on the thread flanks with PTFE tape |
Questions and answers
Which has the higher major diameter, G1/8 or 2-11.5 NPT?
On major diameter, 2-11.5 NPT leads: 60.32 mm versus 9.728 mm.
How do G1/8 and 2-11.5 NPT compare?
On major diameter, 2-11.5 NPT leads: 60.32 mm versus 9.728 mm.