Let me refrase my reputtle,I personally don't use stainless screws verry often because they are soft,all I'm saying is if a screw fits and works then it works ,I prefer the carbon steel black screws personally,but as for screws having to match,..the only perpose that serves is visuals,if the thread count is the same and the threaded hole is deep enough then a longer screw could be used,so on and so forth, if you have the 40$ to spend on a screw kit then great for you man,but I don't so I use what I got on hand and never have any problems ,
A good quality screw should always be used on something like motor mounts
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