I've seen them many times before but can't seem to find the an image, name or product.
You know the clip on your houses circuit breaker panel door that keeps the door closed. It's a little metal clip M shaped clip that snaps into a metal edge or pin. Well, I've seen them on flat panels to secure them over openings in thin sheet metal walls. I have a 6 inch round opening in sheet metal I want to cover with a 7 inch 1/4 plywood and want it to snap in. To open it I would have to apply pressure out to compress the clips.
What is the name of those clips and where can I find them?
They look something like this..but orientation is wrong and seem too thick. the idea is that the clip is attached to the panel and just needs to snap into the substrate.