find a big nut that the rounded off part of drain plug fits into then plug weld them together. the heat should help unstick the plug so it can back out and be reused...just a big azz wrench/socket is needed next time.
no
on the pan or pulg as it is only a thin nut tack weld to the inside of pan.
they make re-threder plug for drain hole repair when the threds are shot but of no help for you at the moment. you are just stuck and rounded off.
if no welder the try a lot of heat and spay it with blaster to cool it down,that should suck some blaster into it to free up the threds.
good luck
