#8 x #4 Male Reducer Fitting

The #8 x #4 Male Reducer Fitting from FRAGOLA is a straight-port AN adapter designed to connect AN hose or port sizes in high-performance hydraulic and fuel systems. This reducer fitting steps down from an 8 AN male inlet to a 4 AN male outlet, making it essential for custom fabrication, motorsports plumbing, and precision fluid transfer applications where size transitions are unavoidable. Whether you're building a custom race engine bay or integrating components with mismatched port sizes, this adapter provides a seamless, leak-free connection point.

Constructed from lightweight aluminum and finished in blue anodized coating, the #8 x #4 Male Reducer Fitting resists corrosion while maintaining minimal weight—critical in motorsports and aerospace applications. The aluminum body provides excellent thermal conductivity and chemical resistance to fuel, oil, and coolant media common in performance systems. The straight-port design eliminates flow restriction at the transition point, reducing pressure drop and heat generation in demanding high-flow scenarios. Blue anodizing protects the fitting from oxidation and wear while providing a professional, color-coded appearance that aids in system identification and assembly.

Technicians and fabricators benefit most from this adapter when converting between legacy and modern AN component standards or when space constraints require downsized port runs downstream. Installation is straightforward—simply thread the 8 AN male end into your primary component and attach your 4 AN hose or adapter to the outlet side using appropriate AN wrenches. This fitting is compatible with all standard AN hose, fittings, and adapters rated for equivalent pressure ratings. For maximum longevity, use PTFE thread sealant or hose clamps as appropriate for your application, and verify pressure ratings match your system specifications.