Russell Performance 660603 AN Hard-Line Tube Nut Adapter Fitting

The Russell Performance 660603 is a precision-machined AN hard-line tube nut adapter fitting designed to securely connect steel or aluminum tubing to AN-style fittings. Part of Russell's industry-leading line of AN Hard-Line Tube Nuts & Tube Sleeves, this fitting is ideal for custom fuel, oil, brake, or coolant hard-line fabrication where a flexible hose assembly is not suitable or permitted.

Key Features:

• Precision machined for precise thread engagement and a leak-free connection
• Lightweight aluminum construction keeps overall system weight to a minimum
• 37-degree AN sealing angle ensures a positive, pressure-tight seal at maximum operating pressures
• Durable Endura finish for corrosion resistance and long service life
• Reusable design allows for disassembly and reinstallation without damage to the fitting
• Universal application — compatible with all Russell AN hose ends and hard-line assemblies
• Straight fitting angle for clean, direct plumbing runs

Russell Performance adapter fittings are the trusted choice for professional builders and performance enthusiasts who demand reliability in high-pressure fluid systems. This tube nut is sold individually and is a direct replacement or expansion component for any Russell AN hard-line plumbing setup.