When I first started working as a helper years ago, there was a older man named Junior who had 2 - 5 gallon buckets full odd screws, brackets, wirenuts, etc. Every made fun of him for keeping all that "junk", but for home reason whenever somone needed an odd screw they tracked Junior down to sort through his bucket.

Junior now is too old to wire houses, but works part time at the supply house just helping out. Next time I'm in there I'm going to ask him if he still has those buckets.