Tried a heat gun on my two shower faucets, got hot enough to ignite a tiny bit of something in the wall. No flames but it glowed for 20 seconds. Hot enough that the socket warmed up within a minute of applying to the work, but still won't budge. Whacked cross bar with a hammer a few times, no improvement.
Almost ready to quit, but after it cooled sprayed some more PB Blaster on them. Now CAN'T find the socket. No telling when it will turn up.
This is metric and none are big enough, 1-1/32", but still gives rise to a question:
What does this mean? How would one stack two sockets?