We are a manufacturer of Duplex Fasteners in accordance with ASME SA479 and ASTM A479, and we stock 2205 Duplex Stainless Steel Bolts up to 3/6" to 2" or Custom Sizes. The best price for alloy, nuts, stud bolts, and screws on the internet. https://www.micrometals.co.in/uns-s31803-uns-s32205-duplex-steel-nut-bolts-fasteners-manufacturers-suppliers/