I have a problem holding thin aluminum, about .080", together for a period of 3 - 4
months in an outdoor environment. I have tried drilling and taping with # 8, 10, 12,
fine & course thread machine bolts, which last a few cycles then strip out. The force
needed is about 3 - 5 lb compression. I only have limited access to one side of the
joint. I'm now thinking of a finer thread screw such as drywall screws which are
designed for metal studs. Any thoughts or suggestions??

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