While at the Isabella Stewart Gardner Museum, we had to take a few of our LED panel lights that our Collection Maintenance Technicians were using out of service, and in their stead, they borrowed some scandle lights from the lab. Unfortunately, over time, some of the fasteners that held the cones in place had gone missing, leaving them a little precarious.

I took one of the existing fasteners, and washers home, did some measuring, and modeled replacements. It took a couple tries to get them right, and rather than try and model tiny threads, I just printed them in PETG and taped them for the screws. They held the threads beautifully, and worked like a charm.