The material of your nuts and washers matters, which is why we offer ours in both stainless steel A2 as well as zinc plated steel. Whatever option makes the most sense for your project! We also carry both nylon insert lock nuts as well as T-nuts. If you are looking for top quality nuts, bolts, screws, and more, it is time to shop with Monster Bolts! Get the perfect size for your project. Do you have any questions about our products and how we may be able to assist you? Feel free to contact us! Reach out today and tell us what you think about our bolts.