Did a search and came up with nothing. What is the thread type on the blue plastic drain plugs? Had one break off and the plastic has pretty much welded itself into the adapter bushing that screws into the block ('97 7.4L). Could chase the threads if I knew what size they are. Otherwise I'll just get a new adapter bushing. Thanks!

1/2-13 thread.

1/2 13 just like a bolt

Thanks all!