Review on SNUG Fasteners SNG198 Pack of Fifty (50) M8 Rivet Nuts-Zinc Plated Carbon Steel Flat Head Threaded Metric Inserts by Marcus Price

There are no complaints about these rivet nuts. The internal threads are smooth and I haven't found any burrs (out of the half dozen I've used so far). They fit well and are secure. These are zinc coated steel nuts. The finish has an iridescent hue (looks like heat treated stainless steel) that I've never seen before. Measurements are accurate. They come in a quality plastic tub with a clear lid, making it easy to find a bin that has everything you need when sorting bins and boxes around the workshop. Good price.