The DIN 7991/ISO 10642 standard specifies the characteristics of countersunk flat head screws with hexagon socket head, commonly used in mechanical and construction applications. These screws are designed to be flush with the surface when installed, providing a neat and streamlined appearance. The standard covers the dimensions, materials, and mechanical properties of these screws to ensure they meet the necessary requirements for strength and durability. Additionally, it includes the requirements for the countersunk angle and the head diameter, ensuring a precise fit and a secure fastening. Adhering to the DIN 7991/ISO 10642 standard ensures the reliability and uniformity of these essential fastening components across various industries and applications.