I am installing new seacocks and am ordering the thruhull bolts.
I have heard before here on this forum 85-5-5-5 or something like that.
Now when I'm ordering screws I find fastener supply houses offering 651 and 655 bronze.
I believe so far from my researching that 651 is lower silicon which gives the alloy it's strength and 655 contains higher silicon.
I think 651 is what we use for seacock screws.
Please correct me if I'm wrong.
But where does 85-55-5 come into play?