"Richard Casady" wrote in message
.. .
On Tue, 8 Jul 2008 11:11:58 -0400, "mmc" wrote:

You must have missed the part about galvanic action between s/s and
aluminum. I think all agree about the bedding compound.

Aluminum needs to be nearly twice as thick to have equal strength. The
boltholes ain't that big. You use antiseize amd hope for the best.
Aluminum bolts and screws are scarce, which may actually be the
deciding factor. You know a source for aluminum fastners ? The high
strength alloys, of course.

Casady

Nope. Right now I'm in the process of rebuilding my 1997 pontoon boat and
would have liked to use aluminum machine screws instead of stainless. Unlike
the manufacturer, at least I'm not using s/s screws and metal nuts!