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

The Hourglass Spacers 5/16inID x 1inOD x 1in by ALLSTAR PERFORMANCE are precision cylindrical spacers engineered for high-performance automotive and mechanical assembly applications. These components serve as critical spacing elements in suspension, drivetrain, and engine builds where precise gap management is essential to proper component alignment and clearance. Used extensively in racing, restoration, and heavy-duty equipment setups, hourglass spacers maintain concentricity and prevent component drift during high-load or high-vibration environments.

Featuring a 5/16-inch inner diameter and 1-inch outer diameter with 1-inch axial length, these spacers deliver the precise dimensional tolerances demanded in OEM and custom fabrication work. The hourglass profile—slightly necked at the center—distributes load concentrically and reduces radial stress concentration, making them ideal for shaft-to-hub interfaces, bearing spacing, and suspension geometry correction. ALLSTAR PERFORMANCE manufactures these spacers to maintain tight tolerances and consistent geometry across repeated installations, ensuring repeatability across multiple vehicle builds or systems.

Mechanics, fabricators, and performance technicians rely on these spacers in clutch assemblies, differential builds, and independent suspension setups where even small variations in spacing can affect alignment angles and component wear. The lightweight design (0.12 lbs per unit) makes them suitable for weight-conscious builds without sacrificing structural integrity. Installation is straightforward—simply position between mating components and secure per your assembly specifications. For applications requiring multiple spacers, buying in bulk ensures consistency across all positions and simplifies inventory management for shops running high-volume projects.