Jake, You are right about the Viking Marine brand of ports breaking out the threads.
They are made of a brittle plastic. Direct pressure can break even the small ones out.
I have a collection of black and white, 4" & 5" lids.

I believe that West Marine and Boater's World, carry the Beckson brand of ports.
They are made of a tougher, more flexible type of plastic.
That is the brand which comes stock on Hobie Tigers.

I would never trust a Viking port to glue it in, but I would trust the Beckson ports.