C mount lenses can be used on a C mount camera. According to standard, the C mount flange back distance is 17.53 mm.
Mounting a heavy and long lens may cause damage to the camera board. If the lens is considerably heavier than the camera, the lens’ weight may exert significant force on the lens mount attached to the camera’s board causing unexpected damage to the board and soldered components. If a heavy lens is necessary for the production environment, it is recommended to use the lens as a mounting point rather than the camera to avoid damage to the camera.