The DIN 6923 is a type of hexagon nut with a flange, designed to provide a wider surface area for better distribution of pressure and to prevent loosening under vibration. This type of nut is commonly used in applications where a secure fastening is required, such as in automotive and machinery industries. The flange also helps to protect the mating surface and provides a more finished appearance. DIN 6923 nuts are available in various materials and finishes to suit different environmental conditions and requirements.