I'm planning to cut the hole, such that the hole perimeter meets the jam nut face about the outerAre you going to weld it to the pan or are you going to set it through, which might seal better if is welded on both sides?
Exactly what he said.I tig welded my bung in the pan..But.. I would not be afraid to mig it. Make sure to start and direct most of the heat into the bung and dift onto the pan quickly then back to the bung. I would stitch as to keep the pan cooler.
Try to practice with a piece of metal sized to the bung and a piece of thin metal first.
not s bad idea!Exactly what he said.
For bungs, I buy stainless steel flange nuts and drill & pipe tap them to the size I need.