Hexagon Flange Bolts

Pattern Fasteners manufactures special and non-standard hexagon flange bolts for automotive, machinery and general engineering applications.

A hexagon flange bolt combines a conventional external hexagon head with an integral flange beneath the head. This provides a larger bearing surface than a conventional hexagonal bolt and can eliminate the requirement for a separate washer in suitable assemblies.

Why Use a Flange Bolt?

The integral flange helps distribute the clamping load over a greater surface area.

Depending on the design, flange bolts can provide:

• Increased bearing area

• Improved load distribution

• Simplified assembly

• Reduced component count

• Consistent positioning of the bearing surface

Flange bolts are particularly widespread in engineering and automotive applications.

Bespoke Hexagon Flange Bolts

Where standard flange bolts do not suit the assembly, we can manufacture components with modified or completely bespoke dimensions.

Options can include:

• Larger or smaller flange diameters

• Increased flange thickness

• Special hexagon sizes

• Partial or full threads

• Non-standard thread pitches

• Stepped or reduced shanks

• Special lengths

• Cross holes

• Drilled centres

• Special end features

Serrated & Special Flanges

Depending on the application, the underside of a flange can incorporate additional features such as serrations or other customer-specific geometry.

Serrated flange designs can provide resistance to rotation in appropriate assemblies, while plain flanges provide a smooth bearing surface.

Manufactured to Drawing

Pattern Fasteners can manufacture hexagon flange bolts from customer drawings or samples, including components based on standard flange bolt designs but with dimensions or features modified to suit a specific assembly.

Contact our team with your drawing, quantity, material and finish requirements.