Very interesting thread. When I was looking for a
boat I saw a First 40' here in Fajardo PR that had badly corroded
keel bolt nuts. They would crumble just by touching them. I contacted
Beneteau and they told me that the studs were
stainless steel and the nuts were galvanized. That made sense since the studs looked perfect. It was just the nuts falling apart. You can replace them one at a time.
In my First 456, the
keel was removed by "accident" after
hurricane Hugo. Theese
boats had a reputation of weak keel to
hull joint structure. So the previous owner had the lower
hull structure reinforced from the inside of course and the keel was reinstalled and attached to the
boat with new 316SS bolts and nuts. As an extra meassure he ordered custom 316
stainless steel 5/8 inch thick angles to provide extra support from the inside. The bolts go through the SS angles which are also attached to the inner structural elements of the hull. From an engineering point of view it is overkill but it is very nice to open the
bilge and see such a strong structure holding the keel.