#4 Alum Tube Sleeves (10pk) Black

The FRAGOLA #4 Aluminum Tube Sleeves (10-pack) in Black Anodized finish are precision-engineered fittings designed for 1/4-inch tube connections in fluid transfer systems. These AN-4 rated sleeves serve as the critical sealing component in hydraulic, fuel, and cooling line assemblies, providing reliable vibration isolation and tube retention across high-pressure applications. The black anodized aluminum construction offers corrosion resistance while maintaining lightweight characteristics essential in performance and off-road vehicle builds.

Each sleeve is sized to accommodate standard 1/4-inch tube diameter with the AN-4 specification rating, ensuring compatibility with FRAGOLA fittings and other AN-compliant components. The black anodized finish provides both aesthetic consistency and protective oxidation against moisture and corrosive environments—particularly valuable in marine, salt-air, and outdoor storage conditions. The 10-pack quantity allows builders to outfit complete fluid systems or maintain spare inventory for maintenance and repairs without additional ordering. Compact packaging (dimensions 1.15 x 0.85 x 4.1 inches, weighing just 0.02 lbs per unit) makes these sleeves easy to stock and transport.

These sleeves are essential for custom hydraulic line fabrication in off-road recovery winches, high-performance engine builds, transmission coolers, and suspension systems. They're also standard in marine engine cooling loops, where salt spray exposure demands anodized aluminum's protective properties. Technicians and builders working with AN-rated tubing systems rely on FRAGOLA sleeves to maintain system integrity under pressure cycles and thermal stress. Whether restoring classic vehicles, building competition rigs, or maintaining industrial fluid systems, having a supply of properly-sized sleeves prevents leaks and ensures professional-grade connections.