#12 x 3/4-16 (#8) Radius O-Ring Fitting Black

The #12 x 3/4-16 (#8) Radius O-Ring Fitting Black serves as a critical adapter for high-performance fluid systems requiring a secure, leak-proof transition between different hose sizes. Designed by Fragola Performance Systems, this straight adapter allows users to connect a 12 AN line to an 8 AN O-ring boss port, making it an essential component for custom fuel, oil, or coolant plumbing. Whether you are building a high-pressure fuel system or optimizing a cooling circuit, this fitting provides the necessary versatility to bridge varying hardware standards. Its presence ensures that builders can maintain consistent flow rates while adapting to specific component requirements in demanding environments.

Constructed from lightweight yet durable aluminum, this fitting features a black anodized finish that provides superior corrosion resistance and a professional aesthetic. The inclusion of the radius entry design optimizes fluid flow by reducing turbulence as the medium transitions through the adapter. The 3/4-16 thread pitch corresponds to standard 8 AN O-ring boss specifications, utilizing a high-quality seal to prevent leaks under significant pressure. Precision machining ensures that the threads engage smoothly, reducing the risk of galling or stripping during installation in aluminum blocks or manifolds.

This #12 x 3/4-16 (#8) Radius O-Ring Fitting Black is ideal for automotive enthusiasts and professionals who demand reliability in their plumbing configurations. It is specifically designed for use with O-ring boss (ORB) ports, which are commonly found on aftermarket fuel pumps, regulators, and oil filter housings. The 12 AN male side provides a robust connection point for larger diameter hoses, allowing for maximum volume delivery where it is needed most. Proper installation requires ensuring the O-ring is seated correctly to maintain a pressure-tight seal across a wide range of operating temperatures.