R1/16 vs 1/16-27 NPT: specs compared
Updated 05 September 2026.
7.94 mm
1/16-27 NPT wins on major diameter
On major diameter, 1/16-27 NPT leads: 7.94 mm versus 7.723 mm.
| Spec | R1/16 | 1/16-27 NPT |
|---|---|---|
| Designation | R1/16 | 1/16-27 NPT |
| Major diameter | 7.723 mm | 7.94 mm |
| Threads per inch / pitch | 28 | 27 |
| Thread form | tapered, 55 degree | tapered, 60 degree |
| Seals on | on the thread flanks with PTFE tape or paste | on the thread flanks with PTFE tape |
Questions and answers
Which has the higher major diameter, R1/16 or 1/16-27 NPT?
On major diameter, 1/16-27 NPT leads: 7.94 mm versus 7.723 mm.
How do R1/16 and 1/16-27 NPT compare?
On major diameter, 1/16-27 NPT leads: 7.94 mm versus 7.723 mm.