+1 on no hose clamp. You'll never get enough tension on the little screw and stamped metal to keep it from sliding down the smooth rod surface. Can't see epoxy helping here either.

It might be possible to repair the male and/or female threads, however. Seeing as it's a H16, I'd take a hard look at what remains of the mast rotation stops on the mast base before wasting time on a repair vs. replacement.

Hope this helps.

Mike