When a customer brings in a coin pendant with the screw striped, I
clean the threads from the pendant with a Krause bur then fit a wire
in the hole and rivet it closed.
Do Not solder the wire in, actually rivet the ends down. The tubes
are soldered to the frame and will move or come off easily if you
try to solder the wire in. Also if the customer ever wants to
change the coin you can cut the rivet head off and replace the
Brad Simon CMBJ