Thread threading nuts in SS?

I think this was posted here before but I cannot find the post anymore. I want to replace these self threading nuts which are used to hold the lid side panels to the lid. Are there any SS versions out there? I can only find zink ones.
I am talking about these:
https://www.clipsandfasteners.com/Nuts-Self-Threading-s/131.htm
And I assume the stud size is 1/4" or about 6mm. Is this correct?

I think the size is correct, however, I think it is going to be tough to find them in stainless. I couldn't find any on a quick search.