When adhesives — my go-to solution for attaching things to thin panels — aren’t an option, here’s a great alternative: plastic hollow door anchors. They pop through thin panels, then spread outwards – just like metal toggles, but with less chance of damaging the panel.
These types of anchors work in a rivet-like fashion, and are simple to install: drill the hole, fold the anchor arms together, insert the anchor, pop the anchor open with the included pin, and drive a screw into the anchor.
Plastic hollow anchors are available in different sizes corresponding to varying material thickness, and can also be used in solid materials. They also provide excellent vibration dampening — especially when used in sheet metal. And since they’re made of nylon, you’re not limited to using a particular fastener size or thread.
My favorite plastic hollow anchors are made by Toggler. I’ve been using their smallest anchors which support 1/8 to 1/4” thick panels and accept #8 to #12 1 1/4“ or longer screws. Street pricing varies by size and volume, but I’ve found 10-packs starting at around $5 and 100-packs for around $10.