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We're reinstalling the hood scoop on a 2008 Shelby GT & don't want to use rivets. No body at Shelby will return my calls, so hopefully I can get answers here. What's known: - Need to use aluminum fasteners on aluminum hood. - Looks like there is space in the hood blanket underneath to allow for the fasteners to stick down some. - I can't find standard aluminum screws to easily purchase & Fastenal says they can make the screws from scratch, but don't have an aluminum locking nut for them. Questions: - What does the engine compartment temperature get up to? - We're looking at using a Nylock type nut underneath because they can be controlled & gently tightened, which is important since the hood is 2 thinner layers. I've read that nylocks are good up to 250 degrees. The nut would be between the blanket & the hood so presumably shielded from some of the heat. - Are you aware of an appropriate aluminum fastener to use, besides a rivet? - Fastenal says they'd have to make what I need, taking 3-4 weeks, & they don't have an aluminum nylon nut for it. The fastener we're looking at having made is a #6 aluminum button head cap screw, 3/4" in length, shaft close to 1/8" in diameter, head about 1/4" diameter, hopefully satin aluminum finish or considering blue (car is Vista Blue). I'd have to purchase one or both just hoping the colors match & can't return. - Do you have a source to convert American standard dimensions to metric? - Since having trouble finding a standard fastener I might have to look at going metric. Prefer not to. - If Shelby used a 3/4" rivet (shaft only), what length of screw would you recommend? - I'm guessing 3/4" + length for a nut (nylocks are longer than non-locking nuts) + if not a locking nut then extra length for a locking washer. Wonder if missing something... - I can't use steel at all, can I? What about a brass nut? - It will cause electrolysis on the aluminum screw &/or washer &/or hood. (I had this problem at both hood pins). Even just a steel nut can cause electrolysis to travel up the screw & potentially to the hood at some point. - Why is this such a damn hassle? Thanks for your help on this.