Diveney's old stuff circa 2012 used to be some type of surgical or radial... but I think anything within the last decade has been a modified 3/8-10. A Diveney shaft will fit on a McDermott and a McDermott shaft will fit on a Diveney. I'm not really familiar with other makers, but 3/8-10 is pretty common as is radial. My advice is to avoid any oddball or proprietary type pins as it just makes getting a new shaft a pain in the rear.
Many cue makers use the 3/8x10 modified pin.
In most cases, the modified version shafts will fit the old pin.
Old shafts may fit the mod pin, if not, the could be tapped to fit all.
Modified pin has a larger minor diameter so shafts made for the mod. will fit a standard 3/8x10. Some shafts need to be re-tapped to go on a mod. The mod. pin is better. Here's good expl. why: https://www.dzcues.com/modified_pin.html