Last post is right- you need 6-32 size. As for the distance between holes, I believe 3.5" HDD centers are 28, 70, 130 mm measured from the end...
If I were doing something like this with aluminum, I would find someone with a shop and a drill press with a high-quality table, and spend some...
Hey all - I'm new to the forums, so let me know if this is in the wrong section/prefix/etc... I've been lurking for a couple days trying to...
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