DIN 934 A4 stainless steel hex nuts are used for metric bolted joints where high corrosion resistance and reliable fastening are important. DIN 934 is a widely recognized standard for metric hex nuts and is commonly used with bolts, screws and threaded rods in machinery, industrial equipment and engineering applications. The range includes DIN 934 hex nuts in A4 stainless steel with standard metric threads in multiple sizes. A4 is suitable for applications where fasteners are exposed to more demanding corrosive environments and where stainless steel components are required for long service life and reliable performance.