We offer a range of metric A4-80 stainless steel set screws. A4 stainless steel offers great resistance to corrosion and can be used in marine environments. A4-80 is a higher grade of high tensile strength compared to A4. Set screws are designed to join two or more components together, typically used in a tapped (threaded) hole, which is blind, and therefore the set screw does not protrude. All products conform to the respective DIN specification.