Thanks Segler,
Will order some.
I thought 304SS is a part of the 18-8 SS family?
You are right. Also 18-8 screws are often 304 since it is the preferred alloy for cold forming process(common for screws) whereas 303 is preferred for machined parts. So, if the 304 screws are working for you, use them. Obviously, 316/A4 would be better...