"The Newport 28’s hull is solid fiberglass while its deck is cored. The hull-to-deck joint is on a narrow flange and leaks are not uncommon."
This from a review of the Newport 28 at this link:
Sailing Magazine | Newport 28
Most of your bolts are holding your deck and hull sections together.
I wish my boat had the perforated AL rubrail instead of teak. The perforated rail is much more functional.