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

The Hourglass Spacers 5/16inID x 1inOD x 1-1/2 from ALLSTAR PERFORMANCE are precision-engineered aluminum standoffs designed for engine builders, suspension technicians, and performance mechanics who demand accuracy in component spacing. These hourglass-profile spacers excel in high-vibration environments where conventional washers fail, maintaining consistent clearance between fastened parts under thermal cycling and mechanical stress.

Whether you're assembling a race engine, installing accessory brackets, or spacing suspension components, these spacers deliver the rigidity and reliability that serious automotive work demands. The 5/16-inch inner diameter accommodates standard 5/16-inch fasteners, while the 1-inch outer diameter provides substantial bearing surface to distribute load without crushing delicate housings or composite materials. The 1-1/2-inch length gives you flexibility in spacing applications where intermediate clearance is critical.

The hourglass profile—wider at both ends, narrower at the center—maximizes structural rigidity while minimizing weight, a design principle proven across thousands of championship race builds and OEM performance applications. Aluminum construction resists corrosion without sacrificing strength, and the precise machining ensures zero runout when installed with proper torque. Professional mechanics and engine builders rely on these spacers for their durability and performance in demanding applications.