4-1/2-4NH vs M24 x 1 female / 55/64-27: specs compared
Updated 05 September 2026.
146.3 mm
4-1/2-4NH wins on major diameter
On major diameter, 4-1/2-4NH leads: 146.3 mm versus 24 mm.
| Spec | 4-1/2-4NH | M24 x 1 female / 55/64-27 |
|---|---|---|
| Designation | 4-1/2-4NH | M24 x 1 female / 55/64-27 |
| Major diameter | 146.3 mm | 24.0 mm |
| Threads per inch / pitch | 4 | 27 |
| Thread form | straight (parallel), 60 degree | fine parallel |
| Seals on | rubber gasket in the female swivel | washer inside the aerator housing |
Questions and answers
Which has the higher major diameter, 4-1/2-4NH or M24 x 1 female / 55/64-27?
On major diameter, 4-1/2-4NH leads: 146.3 mm versus 24 mm.
How do 4-1/2-4NH and M24 x 1 female / 55/64-27 compare?
On major diameter, 4-1/2-4NH leads: 146.3 mm versus 24 mm.