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True, they won't rust, but if you don't use a anti-sieze product they will corrode and then never come apart again. Also, never use an impact on SS nuts to SS bolts, the friction will sieze the threads. I have friends who work in chemical plants and they always seem to have SS bolts laying around for the taking, but it takes a learning curve to use them.
You can probably buy them cheaper from McMaster Carr. Of course if they are polished you would have to do that. I usually buy in bulk from McMaster and save the dollars for other items. Just my opinion and it is exactly worth what you paid for it.