Russell Performance 660553 -3 AN Black Anodized Hard Line Tube Nut Fitting

The Russell Performance 660553 is a -3 AN black anodized aluminum tube nut designed to connect steel or aluminum hard line tubing to 37-degree AN fittings. Whether a flexible hose assembly isn't practical or regulations require hard lines, this precision-machined fitting provides a clean, leak-free solution for brake lines, fuel lines, and other hydraulic hard line applications.

Key Features:

• AN Size: -3 AN, compatible with 3/16 in. O.D. tubing
• 37-degree AN sealing angle for a positive, leak-free seal
• Precision machined aluminum construction for accurate thread engagement
• Black anodized finish for corrosion resistance and clean appearance
• Lightweight aerospace-grade aluminum construction
• Reusable and straight fitting style
• Universal application — compatible with steel or aluminum hard line

Russell tube nuts are used alongside matching tube sleeves (sold separately) to terminate hard lines directly into AN-style adapter fittings. The black anodized finish complements both factory and custom plumbing installations. For use with Russell or compatible 37-degree AN hard line systems.