a quick and easy way of fastening aluminum together
https://www.homedepot.com/p/Arrow-Faste ... /304679378
just any cheap pop rivet gun will work
I used 1/8"x1/4" rivets similar to these
https://www.amazon.com/Aluminum-Blind- ... ef=plSrch
homedepot will have it all
Rivets are a great way to go. Most rivets have a range of panel thicknesses that they will work for, so just make sure you pick the right one. Only downside is they are bit more permanent than nut/bolt if you want to disassemble your fixture, but drilling them out is easy.