Hitachi HV-D25 - Manual (Page 22)

9
Camera mounting
The camera is provided with threaded screw holes at the top and bottom. These allow mounting to either a tripod or a mounting bracket.
Screw type
‚k
U 1/4-20
Length: 4.5 to 6 mm
Screws longer than 6 mm can cause internal damage, while less than
5 mm prevents secure fastening and risks dropping to cause damage
and injury.