DIN 557 specifies the dimensions and technical requirements for square nuts. These nuts are mainly used in conjunction with bolts and screws to secure different components together. The standard outlines the various sizes and specifications for square nuts, ensuring that they meet the necessary criteria for quality and performance. By adhering to the guidelines set out in DIN 557, manufacturers can produce square nuts that are reliable, consistent, and compatible with a wide range of applications. This standard plays a crucial role in ensuring the functionality and safety of various mechanical and structural systems where square nuts are utilized.