A flange bolt is a type of bolt with an integral flange, typically located beneath the bolt head. This flange serves a similar purpose to that of a flange nut—it provides a broader surface area for distributing the clamping force and helps prevent the bolt from loosening due to vibration or movement. Here’s an overview of flange bolts:

Design:

  • Hexagonal Head: Flange bolts typically have a hexagonal head, allowing them to be tightened or loosened using a standard wrench or socket.

  • Integrated Flange: The distinctive feature of a flange bolt is the built-in flange beneath the head. This flange extends outward from the bolt shaft and provides a wider surface area for distributing the clamping force.

Function:

  • Stability: The flange on a flange bolt helps improve the stability of the bolted joint by providing a larger contact surface between the bolt head and the material being fastened.

  • Vibration Resistance: The broader flange design helps prevent the bolt from loosening due to vibration or movement, making flange bolts suitable for applications where reliability is crucial.

Applications:

  • Automotive: Flange bolts are commonly used in automotive applications, such as engine assemblies, suspension systems, and chassis components, where stability and vibration resistance are essential.

  • Construction: They find use in construction projects, including steel structures, bridges, and heavy machinery, where secure fastening is required in high-vibration environments.

  • Machinery: Flange bolts are utilized in various machinery and equipment assemblies, providing a reliable fastening solution that can withstand the rigors of industrial use.

  • Marine: They are also used in marine applications, such as boat building and repairs, where corrosion resistance and reliability are critical due to exposure to harsh environments.

Advantages of Flange Bolts:

  • Enhanced Stability: The integrated flange provides a broader contact surface, improving stability and reducing the risk of bolt loosening under vibration or movement.

  • Corrosion Resistance: Flange bolts made from corrosion-resistant materials such as stainless steel or galvanized steel offer excellent protection against rust and corrosion, ensuring long-term reliability in outdoor or marine environments.

  • Ease of Installation: Flange bolts can be installed using standard tools such as wrenches or sockets, making them convenient for a wide range of applications.

Overall, flange bolts offer a secure and reliable fastening solution in various industries and applications where stability, vibration resistance, and corrosion resistance are important considerations.