Tube Sleeves Alum -3AN 20pk

The Tube Sleeves Alum -3AN 20pk from ALLSTAR PERFORMANCE (SKU: ALL50330-20) is a bulk pack of aluminum fitting sleeves engineered for fluid and pneumatic systems requiring reliable tube connections. These sleeves are essential components in custom fuel systems, brake lines, transmission coolers, and compressed air applications where secure, leak-free joints are non-negotiable. Whether you're building a race engine fuel system, restoring a classic vehicle, or assembling a hydraulic circuit, this 20-piece set provides the quantity and reliability serious enthusiasts and professional technicians demand.

Each sleeve accommodates 3/16-inch tube diameter and is designed to work with 3AN fittings—the industry-standard designation for -3 nominal bore connections commonly used in motorsports and industrial applications. Manufactured from aluminum and finished in black anodize, these sleeves provide excellent corrosion resistance while maintaining low weight—critical in high-performance and weight-sensitive builds. The black anodized surface also delivers superior abrasion resistance and a professional appearance. The 20-piece quantity in this pack ensures you have spares for multiple connections, repairs, or future upgrades without repeat ordering.

This pack is ideal for fabricators, engine builders, transmission specialists, and DIY enthusiasts who work with AN-spec tubing systems regularly. Installation is straightforward: the sleeve slides over the 3/16-inch tube and seats into the AN fitting body, creating a compression-sealed connection that resists vibration and pressure cycling. Compatibility extends across any system using standard 3AN fittings with 3/16-inch tube—fuel injection systems, oil coolers, radiator bypass circuits, and air suspension setups all benefit from having quality sleeves on hand. The compact 4.45 x 2.35 x 4.8-inch package weighs just 0.12 lbs, making storage and transport effortless on shop shelves or in mobile tool kits.