Adaptor 1-1/4" x 8TPI female to M30 x 3.5 male
Tekantool code 55501
An adaptor that converts 1-1/4 inch 8TPI thread such as is on Nova DVR to a M30 x 3.5mm thread.
Has a grub screw to lock it on to the 1-1/4 thread.
Internal 1-1/4 x 8TPI thread
External M30 x 3.5mm thread.