Do you know what type of screw and bolt this is? Do you know the best way to unscrew it? It attaches my CCTV camera to the ceiling plaster (dry wall).
Drywall – What type of screw/bolt has expandable wings behind the wall surface
boltsceilingdrywallscrews
Related Solutions
For neatness you could consider the use of a carriage bolt through from one side of the wood "pivot" point and then put a flat washer and a nyloc nut on from the other side. The parts look like this:
Carriage bolt - The square part under the rounded head keeps the bolt from turning in the wood.
Flat Washer - This keeps the nut from digging into the wood.
nyloc nut - This special type nut has a nylon insert that keeps the nut from loosening and spinning off the bolt.
If you are replacing an existing fixture, the answer is likely no. What it sounds like you are describing is a thread cutting screw:
or:
These tend to be included with mounting hardware to make it easier to screw them into unthreaded holes in plastic or fiberglass electrical boxes. Unless you are using a new electrical box without threaded holes for the fixture strap (or the attachment points on the strap are not threaded) there is no reason to use them.
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Best Answer
Those are "Mollys": (hollow wall anchors)
https://en.wikipedia.org/wiki/Molly_(fastener)
They don't come out,
the screw comes out (it's long so it comes out slowly), but the anchor part will stay.
It might be possible to drill out the anchor part from the front
Or maybe cut off the arms at the back, remove the nut fold up the stubs and eject the anchor body