Flange bolts DIN 6921 are designed with a built-in washer under the head of the bolt, providing a larger surface area for distributing load and reducing the risk of damage to the surface being fastened. These bolts are commonly used in automotive, construction, and structural applications, where the presence of a washer and the added stability it provides are crucial. The flange design also helps to prevent loosening due to vibration, making them ideal for use in high-stress environments. With their reliability and durability, flange bolts DIN 6921 are a popular choice for securing heavy machinery, vehicle components, and structural elements.