School me on muzzle threads

[Delphus]

So I have been wondering this for a while. I understand the difference between threads, the fact that there are a certain amount of turns cut per inch etc. What I don’t know is what the different threads are used for? Can any thread be cut into any barrel? Are some threads used for specific barrels? I’m looking to cut down my .223, but also want to replace the current gunworks suppressor for a dpt. I have passed up on a few second hand supressors in the past because they were the wrong thread for the rifle. Can I buy another threaded suppressor and cut the barrel to suit?