M22 x 1 female vs M18 x 1 male: specs compared
Updated 05 September 2026.
22 mm
M22 x 1 female wins on major diameter
On major diameter, M22 x 1 female leads: 22 mm versus 18 mm.
| Spec | M22 x 1 female | M18 x 1 male |
|---|---|---|
| Designation | M22 x 1 female | M18 x 1 male |
| Major diameter | 22.0 mm | 18.0 mm |
| Threads per inch / pitch | 1 mm pitch | 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, M22 x 1 female or M18 x 1 male?
On major diameter, M22 x 1 female leads: 22 mm versus 18 mm.
How do M22 x 1 female and M18 x 1 male compare?
On major diameter, M22 x 1 female leads: 22 mm versus 18 mm.