Skip to main content


DIN 9021 is a standard specification for flat washers, commonly utilized in various fastening applications. Manufactured by RSG Fasteners, these washers are designed to distribute the load of a threaded fastener, such as a bolt or screw, over a larger surface area. This helps to prevent damage to the material being fastened and reduces the risk of loosening due to vibration. The DIN 9021 washers are typically made from high-quality materials, ensuring durability and resistance to corrosion, which is essential for maintaining the integrity of the assembly in demanding environments. Their dimensions and tolerances are strictly regulated to ensure compatibility with standard fasteners, making them a reliable choice for engineers and manufacturers seeking to enhance the performance and longevity of their products.