A suggestion a little while ago was to get a cheap or disused surface
box and break the threaded inserts out.
Does anyone happen to know the typical size of screws used in the
connectors of various junction box sizes? If any of these are M3.5
then they might be a good item to use as well, since thay are
typically a less fiddly size. From memory I'd guess they're a coarser
Final tip is that some electrical screwdrivers or sets have a M3.5 tap
on/in them and can be used to cut a new thread if there is enough
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