DIN 603, a German standard published by Deutsches Institut für Normung (DIN), outlines the specifications for hexagonal bolts with a thread diameter of 1.6 mm to 36 mm and a product grade A or B. This standard primarily focuses on the mechanical properties, dimensions, and tolerances of these bolts, ensuring their reliability and consistency in various industrial applications. By adhering to DIN 603, manufacturers can guarantee that their hexagonal bolts meet the required standards for quality, durability, and performance, thereby enhancing the overall safety and efficiency of the systems they are used in.