"Richard J Kinch" wrote in message
. ..
toller writes:

Any thoughts on the best way to seal the metal plug in? It is about 3"
diameter and 1/2" of thread.

Replace it with a PVC plumbing plug and use PTFE tape. Standard drum bung
holes are just NPT pipe thread.

Worked fine, though it took half a roll of PTEE tape to get a snug fit.
Thanks.