M5 screws are used for installing Imaging unit to Bucky unit, stand or table. The four M5 screws are used for the sides of imaging unit frame and the six screws for the rear.
Allowable length of M5 screws from the frame surface are as follows:
Position A (4 places): Less than 14mm
Position B (6 places): Less than 8mm
M5 screws are secured to the image unit frame before shipment. The screws must not be removed for light shielding even they are not used for installing the imaging unit.