| Thread Diameter ×Pitch(mm) |
External |
Aperture |
| C-Mount |
25.4 |
19.5 |
| M22.5×0.5 |
24 |
18.5 |
| M25.5×0.5 |
27.5 |
21 |
| M27.0×0.5 |
29 |
23 |
| M30.5×0.5 |
32.5 |
26.5 |
| M34.0×0.5 |
36 |
30 |
| M35.5×0.5 |
37 |
31.5 |
M37.0×0.75 |
39 |
33 |
| M37.5×0.5 |
39.5 |
33.5 |
| M40.5×0.5 |
42 |
36 |
| M43.0×0.75 |
45 |
39.5 |
| M46.0×0.75 |
48 |
41.5 |
| M49.0×0.75 |
51 |
44.5 |
| M52.0×0.75 |
54 |
47.5 |
| M55.0×0.75 |
57 |
50.5 |
| M58.0×0.75 |
60 |
53.5 |
| M62.0×0.75 |
65 |
57.5 |
|
| Thread Diameter ×Pitch(mm) |
External |
Aperture |
| M67.0×0.75 |
70 |
63.2 |
| M68.0×0.75 |
70 |
63.2 |
| M72.0×0.75 |
75 |
67.7 |
| M77.0×0.75 |
80 |
73 |
| M82.0×0.75 |
85 |
78.8 |
| M86.0×0.75 |
90 |
80 |
| M95.0×1.0 |
99 |
90 |
| M105.0×1.0 |
109 |
100 |
|
