While this was a great idea, it went until now before I got anything that could actually be used on this! My intention all along was to make this work with my Buddipole parts, so I finally ordered the adapter they sell to attach their components to this type of thread.
Strange how time can slip away during the busyness of life, and make it take 5 months to get around to ordering a $6 part! Now that I finally have it, my mast feels much more complete, and I have a whole additional range of antenna tricks available to me on my portable operations!