Originally Posted by JRF0st3r
This is how I secured a Fantastic Vent but I respect other opinions more than my own. Since self tapping screws seemed inconsistent with AS construction and rivets lack control over tightness, I chose #8 machine screws with lock nuts. Also added flat stock aluminum fore and aft to stiffen the skin. See photo.
I like the flat stock backing. Great idea!
I still like SS screws over machine screws with lock nuts, because in the future, that fan can and will fail.
Replacing a fan with screws, simple.
Replacing a fan with machine screws and lock nuts, not so simple.