On this note I will add, Colonel, at the risk of confusing myself further ... that I did try TWO different Campy 8 mm binder bolts when I dove into the dungeon to pursue your query. Neither of them exhibited the phenomena mentioned here by dddd, but the slightly newer one, circa mid 80's or so, with the more pronounced knurling, didn't want to fit in the ear well at all, and given their penchant for snapping, I didn't push it. But the older NR bolt seemed to snug in and grab pretty well. Only used one hex wrench.

The loctite isn't a bad idea, dddd.