[olddog]

In an industrial situation, I witnessed this. Studs were 2.5" diameter. Application is pipe flange, where molten plastic is pumped through at pressures up to 5000 psi. Piping stays about 400 F all the time. Installed with Neversieze. It had been in service 15 years. We were disassembling hot, as you have to or the plastic inside becomes a solid.

We could not loosen the nuts on the studs with a 15,000 ft-lb hydraulic power pack. We even used a 20lb sledge hammer on a 3 foot slug wrench and let the mocho boys have at it a while. An old guy went down and purchased toilet bowl bee's wax seals. Let the bee's wax melt and run into the threads over night. Next morning they come off with ease.