Stainless steel nuts are very strong and stainless steel Flange lock nuts, stainless steel Flange serrated lock nuts, stainless steel self-locking nuts, stainless steel hex nuts etc are our popular types. We often use 304 stainless steel material to produce stainless steel nuts. If you need other material, please contact us freely. Various sizes and colors could be customized according to your drawings or requirements. Most popular sizes are M3,M4 and M5 sizes. If you need other sizes,we could produce them for you as well.