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Christopher Barber wrote:
Mark,
I ama gussen' that Lynn is talking about the Grade 5 and Grade 8 (usually
gold in color, I think) hardware that is available from Lowes and HD. IIRC,
one of these is comparable to certain Mil Spec. It may even be the "lower"
Grade 5 which depending on the application could be used without issue or
great concern. Of course your mileage and comfort level may vary.
That being said, exactly what "standards" are being adhered to and who is
doing the checking is unknown to me just like my aviation parts<g>. FWIW.
Bob Fritz indicated in one of the "Home Machinist" columns that he writes for Kitplanes that the mil-spec bolts we're all accustomed to are really only around Class 5. I can't remember the exact quote or which month it was, but I don recall thinking that it was logical, since the prices from ACSpruce would be about what you'd expect to pay for Class 5.
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