08-21-2014, 03:39 PM
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CC Member
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Join Date: Apr 2012
Location: Bay Area (Peninsula),
CA
Cobra Make, Engine: ERA 427, 427/487 side-oiler
Posts: 1,248
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Not Ranked
I'd use aluminum. If you used steel, the force required to collapse the RivNut could damage the fiberglass. On my ERA, they used aluminum RivNuts exclusively, even in steel structural members, for what it's worth.
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