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I would think that Kroil/Wd40/PB blaster or similar would be part disassembly to help avoid the galling. Some sort of dry lube for assemblyhttp://files.engineering.com/getfile.aspx?folder=fd6a26a1-0b47-4b54-8218-df0f754e6a3a&file=HRH_Valve_005.JPG

The studs are 2"dia., 8 thread, B16 material. Coating unknown if any. They are being used on a large steam valve so its hot and high. :)

I work in a power plant and we often have trouble with large bolting galling or seizing up especially during disassembly. It looks like most of the bolting was assembled with no type of dry or paste anti-seize. I understand the high temps encountered and that lubricating the threads can effect...