What are the brass contacts inside domestic AC power plugs and sockets called?
AC plugs can be used with adapters. The adapters allow a UK style plug to fit in a US wall socket or a French wall socket and vice versa. You normally see them for sale at airports. 

So, get yourself a bunch of adapters to suit the wall socket of your choice then buy a wall socket that is compatible with being soldered to a PCB. If it needs to be a regular wall socket on a flying lead then is this going to be a problem?

Maybe get one of these: -



From here