MEXICOWANDERER wrote:
A 6-point socket of that size would co$t a lot of money. A big rock and the hard place time. Works even better than teflon tape is NICKEL base anti sieze paste. I have had zero luck with any penetrant produced by man versus a siezed tapered pipe fitting.
True, a large 6-point socket isn't cheap, but that is why I stated in my first post "It depends on how badly you want the plug out." I also suggested cleaning the threads with a tap, which is also not cheap in that size, but tools that work, sometimes aren't.
I generally use anti-seize, not sure if it's nickel based or not, on almost any nut or bolt that I figure I'll want to remove at some time.