8AN O-Ring Port Plug Black Low Profile

The REDHORSE PERFORMANCE 8AN O-Ring Port Plug Black Low Profile is a precision-engineered hydraulic fitting designed to seal 8 AN ports in high-pressure fluid systems. Built from aluminum with black anodized finish, this compact plug features an Allen head design and integrated O-ring seal for reliable, leak-free performance in performance fuel, coolant, and brake applications where port closure is required.

The 8AN standard specifies a nominal diameter of 1/2 inch, making this fitting compatible with 8 AN ported components common in high-performance automotive and motorsports systems. The low-profile design minimizes envelope intrusion in tight engine bays, while the integral O-ring eliminates the need for separate sealing washers—streamlining assembly and reducing component count. Black anodized aluminum provides corrosion resistance in harsh underhood environments and a professional appearance. The Allen head socket accepts standard hex wrenches for controlled, repeatable tightening without damage to the fitting head.

This fitting is ideal for builders and technicians assembling custom fuel systems, cooling circuits, and brake lines who need reliable port sealing at a competitive price point. Whether upgrading a carbureted hot rod, closing unused ports on a modified LS engine, or sealing aftermarket heater hose configurations, the REDHORSE 8AN plug delivers proven reliability. The compact footprint and anodized finish make it suitable for both engine bay and chassis-mounted applications where space is at a premium and corrosion resistance matters.

REDHORSE Performance is recognized in the automotive performance community for precision hose fittings and adapters that meet or exceed SAE standards. This 8AN port plug carries the same manufacturing precision as the brand's full line of adapters and is a stock item for professional engine builders and aftermarket shops building or modifying high-performance vehicles.