Jasper none wrote in :

Use Threadserts they install like pop rivets, but leave you with a
reusable thread sleeve. They come in sizes #6 to 1/4, this is
what we use.



These are also called Riv-Nuts. Only caveat is that being aluminum they
are both sublect to some deterioration when against SS and exposed to moist
contaminants, and idividually are not very strong.

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