Our nuts and locking nuts were made from durable materials, including stainless steel A2 or zinc plated steel. This means that you can feel absolutely sure that your nuts will stand up to the test! Choose whether you want yours in metric sizing or U.S. sizing, as we know that every project demands something just a little bit different. We offer a variety of nut types, including hex flanges, hex nuts, nylon insert lock nuts, and T-nuts. Contact Monster Bolts today if you have any questions about our products or the materials. We would be happy to help.