Originally Posted by 61Hawk
Aren't stainless steel bolts awful brittle?
Not sure about brittle, but stainless bolts are roughly equivalent to Grade 5 bolts as far as strength. Grade 8 is "stronger", I am sure it is fine to use stainless in this application. I am by no means an expert, but I use ALOT of stainless fasteners and material in my work. We use them not so much for the strength but the corrosion and heat resistance, strength just happens to be happy by product. I have found stainless to be more likely to seize or gale during installation, but when removing after a long time or many heat cycles they usually come out just fine. (we use them in heater blocks that got up to about 500 F)
I may have steered us a little off track but I thought this was a cool exercise of thinking about hollowed stainless bolts and how they might hold up to this same situation.