M24 x 1 female / 55/64-27 vs 3/4"-11.5NH: specs compared
Updated 05 September 2026.
26.99 mm
3/4"-11.5NH wins on major diameter
On major diameter, 3/4"-11.5NH leads: 26.99 mm versus 24 mm.
| Spec | M24 x 1 female / 55/64-27 | 3/4"-11.5NH |
|---|---|---|
| Designation | M24 x 1 female / 55/64-27 | 3/4"-11.5NH |
| Major diameter | 24.0 mm | 26.99 mm |
| Threads per inch / pitch | 27 | 11.5 |
| Thread form | fine parallel | straight (parallel), 60 degree |
| Seals on | washer inside the aerator housing | flat washer or O-ring in the female coupling |
Questions and answers
Which has the higher major diameter, M24 x 1 female / 55/64-27 or 3/4"-11.5NH?
On major diameter, 3/4"-11.5NH leads: 26.99 mm versus 24 mm.
How do M24 x 1 female / 55/64-27 and 3/4"-11.5NH compare?
On major diameter, 3/4"-11.5NH leads: 26.99 mm versus 24 mm.