Tapered Spacers Alum 1/2in ID x 1/4in Long

The Tapered Spacers Alum 1/2in ID x 1/4in Long (Allstar Performance ALL18590) are precision mechanical components engineered for alignment and load distribution in high-tolerance assemblies. Originally developed for racing and automotive applications, these aluminum spacers have proven indispensable in tactical equipment builds, firearms customization, and precision machinery where critical spacing and concentricity are non-negotiable. Whether you're assembling upper receivers, adjusting optic mounts, or fine-tuning mechanical systems, tapered spacers eliminate binding and ensure proper component indexing under operational stress.

Constructed from aluminum alloy, these spacers feature a tapered internal geometry with a 1/2-inch inner diameter and 1/4-inch length, enabling smooth, interference-free installation while maintaining precise axial alignment. The tapered design compensates for minor machining tolerances and manufacturing variations in mating surfaces, a critical advantage in systems where even a few thousandths of an inch can affect function or safety. At just 0.04 pounds, the minimal weight footprint makes them ideal for load-sensitive applications where every gram matters, particularly in long-range precision rifles and modular weapon systems.

Armorers, gunsmiths, and tactical equipment builders rely on these spacers to achieve proper bore alignment, secure mounting hardware, and eliminate play in critical assemblies. The 1/2-inch ID accommodates standard fasteners used across AR platforms, precision rifle builds, and universal accessory systems. Installation is straightforward—insert between mating surfaces before final torque—making these spacers suitable for both initial builds and field adjustments. Stock these in your maintenance kit for emergency repairs or component sourcing where precision spacing cannot be compromised.