--- "Deikis, John" <John.Deikis@med.va.gov> wrote:
> A friend in Ann Arbor who has been building pro race
> cars for about 100
> years once told me they NEVER use grade 8 bolts in
> any suspension pieces
> because they are more brittle than grade 5 and not
> designed to bend under
> shear forces.
I do know this about the AN bolts Daniel mentions - AN
and MS bolts have true bearing surfaces under the
head. That is, they are manufactured to tolerances
that require the bearing surface (head underside) to
be perfectly normal to the bolt axis. What's the big
deal? As a bolt is tightened the torsion ultimately
induces a bending load that needs to be taken
somewhere. Crappy bearing surface means stress risers
and ultimately failure (snap the head during
tightening or, worse, induce small stress cracks that
fail later under much lower bending loads). AN or MS
grade if you can. www.skybolt.com
Ron Soave
When opportunity knocks, don't bitch about the noise.
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