Hang on to at least a few assorted bits of cutoff Tie-wrap ends. These are a great modern day equivalent to the old toothpick or matchstick in the hole that just won’t take the bite of a screw thread any more. They’re very sturdy, won’t break down over time, and almost act the same as a fiber locknut does on a bolt.
Seems I always have to use one (or two) in non critical use of cement screws in cement wall or block as I can never drill those holes correctly.
