Re: Loose screws in portlight stainless trem
I second Craig's suggestion. Plus, if it fails in less than 50 years Craig will come and personally fix it for you. ;)
3M 5200 is known as "The Devil's Glue" and should really only be used on things that you never, ever, want to take apart again. Offhand, I can't think of a single place on my SM that I would use it in place of something that is almost as strong but way more removable like 3M 4200.
Here's a pretty good article on marine adhesives from Practical Sailor: https://www.practical-sailor.com/issues/36_8/features/Marine-Adhesives-Caulks_5953-1.html
SM #440 Cara
Deale, MD USA