5/8 Aluminum Hex Tube 21in

The ALLSTAR PERFORMANCE 5/8 Aluminum Hex Tube 21in (SKU ALL 56621) is a precision-engineered suspension component designed for high-performance automotive builds. This 21-inch aluminum hex tube features a 0.875-inch hex profile with 5/8-18 female threading and black anodized finish, delivering the strength-to-weight ratio critical for suspension geometry optimization. Built from aluminum rather than steel, this tube reduces unsprung mass while maintaining rigidity—a key consideration when fine-tuning suspension response in competition or high-performance street applications.

The hex design provides superior load distribution compared to round tubing and resists deflection under lateral stress, making it ideal for upper and lower control arm applications. The black anodized finish offers corrosion resistance and a professional appearance, important for both durability and aesthetic consistency in modern suspension assemblies. At 0.85 lbs, the aluminum construction significantly reduces rotating and unsprung weight compared to traditional steel tubes—measurable gains for acceleration, braking performance, and ride quality. The 5/8-18 female threads accommodate standard rod ends and spherical bearings used across Chevrolet, Ford, Dodge, and universal suspension platforms.

This component is essential for builders constructing adjustable suspension systems, drag racing platforms, street rod assemblies, and track-focused vehicles where geometry tuning and weight reduction are performance priorities. Whether you're modifying a classic hot rod, building a modern performance car, or engineering a competition suspension, this hex tube integrates seamlessly with spherical rod ends, Heim joints, and adjustable control arm kits. The 21-inch length suits a broad range of applications, and the hex profile provides installation stability and clearance advantages over round tubing alternatives.