M24 x 1 female / 55/64-27 vs M18 x 1 male: specs compared
Updated 05 September 2026.
24 mm
M24 x 1 female / 55/64-27 wins on major diameter
On major diameter, M24 x 1 female / 55/64-27 leads: 24 mm versus 18 mm.
| Spec | M24 x 1 female / 55/64-27 | M18 x 1 male |
|---|---|---|
| Designation | M24 x 1 female / 55/64-27 | M18 x 1 male |
| Major diameter | 24.0 mm | 18.0 mm |
| Threads per inch / pitch | 27 | 1 mm pitch |
| Thread form | fine parallel | fine parallel |
| Seals on | washer inside the aerator housing | washer inside the aerator housing |
Questions and answers
Which has the higher major diameter, M24 x 1 female / 55/64-27 or M18 x 1 male?
On major diameter, M24 x 1 female / 55/64-27 leads: 24 mm versus 18 mm.
How do M24 x 1 female / 55/64-27 and M18 x 1 male compare?
On major diameter, M24 x 1 female / 55/64-27 leads: 24 mm versus 18 mm.