Hourglass Spacers 5/16inID x 1inOD x 1/2in

The ALLSTAR PERFORMANCE Hourglass Spacers 5/16" ID x 1" OD x 1/2" are precision aluminum components engineered for chassis alignment and suspension geometry correction in high-performance automotive applications. These hourglass-profile spacers distribute clamping loads evenly across fastener connections, reducing stress concentration and maintaining structural integrity in demanding mechanical assemblies where precise spacing between components is critical.

Measuring 5/16" inner diameter (ID) with a 1" outer diameter (OD) and 1/2" thickness, these spacers are sized for fasteners in the range of 5/16" bolt patterns common in modern suspension systems. The hourglass design—wider at the outer faces and narrower at the center—mimics bearing cup geometry, allowing load-carrying fasteners to seat naturally while the aluminum material resists corrosion better than steel alternatives. The natural finish provides a clean appearance without anodizing, suitable for internal chassis applications where aesthetics are secondary to function. Sold as a pair.

Professional chassis builders and suspension technicians rely on these spacers to correct ride height, adjust suspension geometry, and ensure proper clamping force distribution in lowered vehicles, competition builds, and custom chassis work. The 1/2" thickness accommodates moderate suspension adjustments without excessive stacking, while the hourglass profile prevents edge-load failure common with flat washers. Users working on street performance cars, track platforms, and off-road suspension upgrades specify ALLSTAR components for repeatability and dimensional consistency across multiple builds.