Duplex Steel Fasteners a.k.a Duplex Stainless Steel Fasteners are main product line for BoltPort Fasteners. This includes manufacturing and supply of duplex 2304 fasteners such as bolts, screws, stud bolts, threaded rods, nuts, washers, dowel pins, and other custom bolting components. We offer both metric and imperial sized fasteners in duplex alloy 2304. Duplex stainless steel 2304 fasteners are produced from premium quality rolled bar stock or forged bars with latest material specifications. Boltport can manufacture alloy 2304 fasteners in ASME, DIN, ISO & other international dimension standards. These duplex fasteners are also available in equivalent grades F68, UNS S32304, DIN EN Werkstoff 1.4362.