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as above, a lot of people report success with stainless screws based on the absence of corrosion on the screw head. my understanding is any corrosion would be at the point where the metals meet (assuming conditions were right for the corrosion to occur) which means its possible for the...

i had not considered this. thanks for the comments. i was considering the 7075 screws from a company that specializes in aluminum fasteners (as opposed to the readily available big box ones) and as i said in the OP using them only for the siding/trim and perimeter of the roof.... definitely...

i am looking at replacing all the rusty exterior screws on my 2010 eagle to freshen up the appearance and reseal. i have read every thread i can find related to this including all the discussions on galvanic corrosion and what screws are recommended from stainless to zinc plated to coated etc...