DIN 557 specifies the dimensions and technical requirements for square nuts with a coarse pitch thread in diameters ranging from M5 to M39. These nuts are designed to be used with bolts and screws to fasten components in various mechanical and structural applications. The standard provides detailed information on the material, heat treatment, and mechanical properties of the nuts, ensuring their strength and durability. Additionally, DIN 557 outlines the tolerances for the square nuts, ensuring they are manufactured to precise specifications for consistent and reliable performance. This standard plays a crucial role in ensuring the quality and compatibility of square nuts in industrial and construction settings, providing essential guidance for manufacturers and users alike.

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