FHCS 5/16-18 x 5/8 Drive Flange Screw

The FHCS 5/16-18 x 5/8 Drive Flange Screw from Winters is a precision fastener designed for demanding drivetrain and suspension applications where secure, vibration-resistant clamping is essential. This fastener is particularly useful for mechanics working on differential cover assemblies, transmission housings, and engine block ports.

The flange head design distributes load across a wider surface area than standard cap screws, making it the preferred choice for applications requiring reliable long-term retention without loosening. This 5/16-18 thread pitch fastener features a 5/8-inch drive length, allowing proper engagement with factory specification torque wrenches and impact tools without stripping.

Technicians restoring classic trucks, building modified differentials, or servicing transmission assemblies rely on this fastener to ensure consistent performance and durability. The flange configuration eliminates the need for separate washers, reducing assembly time and minimizing micro-movements that lead to fastener creep.