AN Flare To ORB Adapter 9/16-18 (-6) to -4

The ALLSTAR PERFORMANCE AN Flare to ORB Adapter 9/16-18 (-6) to -4 is a straight-thread fitting adapter designed to connect AN hydraulic, fuel, and coolant lines across different port configurations. This aluminum adapter bridges a -6 AN male o-ring boss (ORB) connection to a -4 AN male port, making it an essential component for engine bay plumbing in high-performance racing, marine, and automotive applications where precise fluid routing is non-negotiable.

Manufactured from aluminum and finished in black anodized coating, this adapter provides corrosion resistance and durability in demanding environments. The o-ring boss design ensures a reliable seal without thread sealant, reducing leak risk and allowing quick disconnection and reconnection during maintenance or system modifications. The 9/16-18 thread pitch on the ORB side matches standard AN ORB port specifications, while the -4 AN male outlet accepts industry-standard -4 AN hose fittings and adapters.

This adapter serves fabricators, engine builders, and race teams who need precise flow management across different line sizes without custom machining. It is commonly used in fuel system upgrades, coolant routing modifications, and hydraulic pressure line management where downsizing from a larger port to a smaller line prevents over-capacity and improves system efficiency. The compact 2.05 x 0.9 x 4.05 inch footprint and minimal 0.03 lb weight make installation straightforward in tight engine compartments.

ALLSTAR PERFORMANCE adapters are engineered to match SAE AN specifications, ensuring compatibility with OEM and aftermarket AN hose, fittings, and system components. Whether you are restoring a classic hot rod, building a competition engine, or upgrading a street performance platform, this fitting delivers the reliability required for sustained high-flow applications.