Hourglass Spacers 3/8in ID x 1in OD x 1/2in Long

The ALLSTAR PERFORMANCE Hourglass Spacers 3/8in ID x 1in OD x 1/2in Long (SKU ALL 18822) are precision aluminum spacers designed for suspension and drivetrain assembly work across a wide range of automotive and motorsports applications. Manufactured to tight tolerances, these hourglass-profile spacers distribute loads evenly and accommodate shaft-to-component spacing requirements in high-vibration environments where dimensional accuracy directly impacts safety and longevity.

With a 3/8-inch inner diameter, 1-inch outer diameter, and 1/2-inch thickness, these spacers provide the geometric precision required for bearing stacks, wheel hubs, transmission components, and suspension pivots. The hourglass geometry—narrower at the center, wider at the shoulders—creates a mechanical advantage that reduces edge loading and stress concentration, extending component life under cyclic stress. The natural aluminum finish resists corrosion in typical automotive service conditions and remains compatible with standard fastener systems and protective coatings used in restoration and performance builds.

These spacers serve drag racing, street rod, circle-track, and general automotive repair operations where OEM or performance-spec spacing cannot be achieved with standard shims or washers. Technicians and builders rely on ALLSTAR PERFORMANCE spacers when precise bore concentricity and repeatable stack heights are non-negotiable. Sold as a pair, they eliminate the need for custom machining or improvised spacer solutions that risk misalignment and accelerated wear.

ALLSTAR PERFORMANCE is recognized in motorsports and restoration communities for fastener precision and bearing products that meet or exceed OEM specifications. These hourglass spacers represent the brand's commitment to dimensional accuracy and compatibility across the broadest range of assembly scenarios—from stock rebuilds to high-horsepower custom fabrication.