Purpose of square black washer on outlet cover screws?
I recently removed lots of electrical covers to do some painting. I noticed that almost all of the screws for the covers have a tiny square black washer on them. I was careful to reinstall the cover screws with these washers.
Is there some safety purpose behind these square washers?
As far as I can tell, it's not for safety but rather to keep the screws attached to the outlet so it's not lost... especially when it's new out of the box or in the bin at the store... I've also seen them attached with little rubber grommets..