Miller 1/4"-20 Screw

The shaft length on this is 10mm, not 12mm. The entire height of the screw, including the flat slotted part, is 12mm, but the shaft is 10mm. This is important because some Prosumer cameras, like Sony's, have short internal holes in the bottom, and 12mm screws are too long for them. This is the one you need for those types of cameras, as many 1/4-20 bolts have the longer 12mm thread.

Yes the Ronin S Has a 1/4x20 and 3/8x16 Mounting holes. See instuction manual https://dl.djicdn.com/downloads/Ronin-S/20200109/Ronin_S_User_Manual_v1.6_en.pdf