Russell Performance 660611 Endura -16 AN Tube Coupling Nut

The Russell Performance 660611 is a -16 AN Endura finish tube coupling nut designed to connect AN hardlines to Russell hose ends and performance plumbing components. Part of Russell's comprehensive AN Hard-Line Tube Nuts & Tube Sleeves product line, this fitting delivers the precision and reliability demanded by high-performance automotive, marine, and motorsport applications.

Precision machined from lightweight aluminum, this tube nut features a 37-degree AN sealing angle that ensures a positive, leak-free seal at maximum operating pressures. The distinctive Endura finish provides an ultra-bright appearance that simulates the look of polished stainless steel, complementing billet components and offering excellent corrosion resistance — making it equally at home in demanding salt-water marine environments.

Key Features:

• Precision machined aluminum construction for precise thread engagement
• 37-degree AN sealing angle for a positive seal at maximum operating pressures
• Ultra-bright Endura finish simulates polished stainless steel appearance
• Excellent corrosion resistance — suitable for marine applications
• Designed to mate with all Russell Performance hose ends
• Reusable construction
• Universal fitment — compatible with standard AN plumbing systems

The Russell 660611 Endura tube coupling nut is an ideal choice for custom fuel, oil, coolant, and brake line installations where both performance and aesthetics matter.