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Bought some stainless steel buttonheads for my intake since I didn't care much for the regular stainless socket heads.
Major dissapointment, they won't hold up to torque!! The allen size on the button heads are so small that I can't even get the 25lbs for the runners before they strip out. I going to try leaving whats in but will see if I can find the button heads w/ torx instead of allen. Will most likely have to drill out to remove the ones that stripped.
I really would like to find some stainless buttonheads in Torx...
Although my ongoing research is saying even they may not be strong enough to handle the required torque specs.
Sounds like your ongoing research os on target. Most stainless fasteners are the equivilant of SAE grade 2 fasteners, unmarked hardware store junk. If your torque requirements are for SAE 5 or higher text book torque values, then run of the mill SS fasteners are margnal at best. Many will hold a grade 5 torque but are overstressed at that level.