Flange fasteners are specialized bolts or nuts that feature a wide, integrated washer-like flange at the base of the head. This built-in flange helps distribute the load more evenly across the fastening surface, reducing the risk of damage and increasing the clamping force without the need for a separate washer. Commonly used in automotive, construction, and industrial applications, flange fasteners provide improved stability, resistance to loosening from vibration, and quicker installation compared to traditional fasteners.