#4 Tube Nuts (2pk)

#4 Tube Nuts (2pk) by EARLS are precision hose fitting components designed for secure, leak-free connections in high-performance fluid systems. These aluminum tube nuts are engineered for applications where reliability under pressure is non-negotiable—including fuel systems, coolant lines, and hydraulic circuits in automotive, motorsports, and industrial settings. The 2-pack format ensures you have spare fittings on hand for repairs, replacements, or multi-line installations.

Constructed from lightweight aluminum with blue anodized finish, the #4 tube nuts provide corrosion resistance and durability in demanding environments while maintaining minimal weight—critical in performance applications. The blue anodizing serves both protective and identification purposes, allowing quick visual confirmation of AN (Army-Navy) standard sizing on the work bench or engine bay. Each nut is designed to mate with 1/4-inch tubing and accepts 4 AN fittings, creating a reliable seal through compression fitting geometry that tightens as system pressure increases.

Technicians, engine builders, and restoration specialists rely on EARLS tube nuts to maintain OEM-level performance in custom fuel injection setups, turbo installations, and cooling system modifications. The compact 1.2 x 0.85 x 2.85-inch package makes these fittings easy to stock and transport. Installation is straightforward—thread the nut onto prepared tubing and tighten to secure the fitting without special tools, though proper torque specifications should always be observed per system requirements and EARLS technical documentation.