Metric grade 8.8 is equivalent to SAE grade 5. I think metric 10.8 is equivalent
to SAE 8, or maybe that's metric 12.8. I don't know what A2.70 is. Stainless is
more brittle than regular mild steel. I use stainless bolts only for their
anti-corrosion properties, not their strength.
Gordon Glasgow
Renton, WA
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Patrick J.
> Horne
> Sent: Sunday, September 23, 2001 2:43 PM
> To: datsun-roadsters@autox.team.net
> Subject: Metric bolt hardness question
>
>
> What is the difference between a steel bolt with a hardness marked 8.8
> and a stainless bolt marked A2.70 (or TH5)? The fan blade bolts came
> loose on my 67.5 and 3 broke, while the fourth one was 3/4 gone. The
> original bolts had a rating of 8.8, while the stainless bolts (the only
> ones I could find that would fit) are marked A2.70.
>
> Another question is if Stainless is a better material for use on fans.
> I believe that it is not as brittle as steel, but I'm not sure.
>
> Thanks in advance!
>
> Peace,
> Pat
>
> - Support Habitat for Humanity, A "hand up", not a "hand out" -
>
> Pat Horne, Network Manager, Shop Supervisor, Future planner
> CS Dept, University of Texas, Austin, Tx. 78712 USA
> voice (512)471-9730, fax (512)471-8885, horne@cs.utexas.edu
>
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