A4 stainless steel hex nuts are used in applications where high corrosion resistance and reliable bolted joints are important. A4 is widely used for industrial and engineering applications where fasteners are exposed to more demanding corrosive environments. The range includes hex nuts according to DIN 934 and ISO 4032, including both plain and zinc-coated variants. The assortment also includes PED hex nuts according to EN 10269 for pressure equipment applications with specific requirements for materials, quality and documentation.