This inverted screw replaces the double-sided screw with 3/4" and 1/4" threads included in Sirui tripods and monopods. Original accessory.

Mounting plate Screw is a screw found on Sirui tripods and monopods, with a 3/8" thread on one end and a 1/4" thread on the other. The big boys have said that these get lost in the terrain, so we decided to make the screw our own product!
In addition to the camera's 1/4" or ball head 3/4" mount, the Mounting Plate Screw also locks the monopod's base plate to the frame.