DIN 7991 is a standard that specifies the requirements for countersunk flat head screws. These screws are commonly used in various industries and applications where a flush finish is desired. The DIN 7991 standard ensures that these screws have a specific shape and dimensions, allowing them to fit perfectly into countersunk holes and provide a smooth surface. These screws are typically made from high-quality materials such as stainless steel or alloy steel, ensuring their durability and strength. With their flat head design, DIN 7991 screws are ideal for applications where a flush appearance is important, such as in furniture assembly, automotive manufacturing, or construction projects.