You don't have to worry about galling with 18-8 like you would with 300 series. I like the button heads but some of them need to be machined down to .375 +or-.010" to fit in most stock counter bores.(a collet/lathe setup works really good for this.) McMaster gives dimensions on their screws so you can check if the head diameter needs to be reduced. Some guys go with a allen head cap to eliminate that problem.
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