AV Switch nut too tight

[SimplicityLost]

Hey there, just got my AV switch from TCSS and the nut is too tight for me to get off. I tried to pry it off with a rubber band and a wrench, but no luck. I then tried to heat the nut with a lighter but I'm worried that it might damage the finish or the underlying electronics if it gets too hot. Any advice?

[jbkuma]

You definitely should not use heat on it, the insides are plastic.

[Forgetful Jedi Knight]

Are you sure it wasn’t crossthreaded?

[SimplicityLost]

Unfortunately I'm not sure, I received it this way. I'm not mechanically inclined and I don't know how to identify if that is what the problem is.