A previous owner of my house (I swear it was not me :) ) appears to have broken off a screw in the hole (red circle) that allows the bottom of the outlet to attach to the box, leaving only the top hole (yellow circle) free to attach the outlet to. What's the best way to get the screw out? I know that one option is described in Removing broken screw from electrical box, but I'd like to preserve the existing threads if possible. I tried grabbing it with needle-nosed pliers from the front and twisting it out, but it appears stuck either via corrosion or because it's the wrong size (although they did get it in that far). I was thinking of trying the following approach:
- apply WD-40 to the hole in the front and back to loosen up any rust
- try grabbing it from behind the hole with curved needle-nosed pliers and see if I can at least move it out a little bit farther
- if I can move it with the pliers, either unscrew it all the way, or get it out far enough that I could cut a groove in it to put a flathead screwdriver in
I could just try cutting the groove now, but that seems risky given that it might be stuck in there pretty well if it's the wrong size, and I don't currently have a lot of room for error if I cut it incorrectly.
What do you think? Thanks in advance for any help!