Snap these nuts into square holes in thin material. Threads float inside the retainer so you can install a bolt at a slight angle to align off-center parts. Mounting legs expand to lock the fastener in place. Install them by hand or with pliers.

Zinc-plated steel nuts resist corrosion in wet environments.

These nuts see photo 2 for detailed dimensions.
The data is a single batch, manual measurement, there are errors!
The color of the photo may have a color difference due to the monitor!