Seems like I have seen metric weld bungs before but I just can't think of where. Need to add on some sending units that are metric and it would sure be easy to weld on a bung if possible to find it... Looking for Aluminum...

 

Round stock, drill press and metric tap? Might be easier than you think..

 

Ya, it isn't too hard but if I don't have the taps already which I don't have some of the sizes I'm looking for it would be cheaper to buy a bung...