Hi,
well I'm just getting around to casting and fitting my lead keel, and
I'm using 316 steel bolts ( I know some people disagree but if its
good enough for Van der Stadt its good enough for me!)

So I have ordered the rod and will have a thread cut for the bit that
sticks into the boat, but now my suppliers are offering me A2 nuts to
fit the thread and hold it to the hull.
Does this sound good enough? Should they be A4- or do I have to get
nuts made from 316 steel too?
What is the differnce between A2, A4 and 316 anyway?
Hoping someone can clear a little confusion here.

Pete