engineering.
Gary
Christopher Wright wrote:
>
> On Nov 24, 2009, at 6:58 AM, Gary L. Hodgson and Assoc. wrote:
>
>> I have one customer who keeps wanting to use the nice shiny SAE grade
>> 8 bolts because they look better than those black A325 or A490 bolts.
> To make things worse, the Counterfeit Bolt Affair of the 1990's hasn't
> gone away. If anything it's gotten worse.
> <http://www.nv.doe.gov/library/publications/sitelines/sl100.pdf> The
> original problem was with so-called grade 8 bolts that were actually
> grade 8.2 (or something like it) that were understrength or wouldn't
> hold a pre-load. So when you go through all your spec options keep in
> mind that you could be getting ferro-manurium fasteners if you don't
> shop with care.
>
> Christopher Wright P.E. |"They couldn't hit an elephant at
> chrisw@skypoint.com | this distance" (last words of Gen.
> .......................................| John Sedgwick, Spotsylvania
> 1864)
> http://www.skypoint.com/members/chrisw/
>
>
>
>
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