The mounting ring has a 5/8" internal fine thread (i.e. approx. 16 mm). An adapter piece with an external thread of 5/8" and an internal thread of 3/8" (i.e. a normal tripod thread of approx. 9 mm) is supplied, which is screwed into this fine thread. If the NTUSB is to be mounted using a (small, approx. 6 mm) 1/4" tripod screw, a corresponding adapter must be obtained.
The tripod foot supplied has a fixed 3/8" tripod screw.