#4 Male Flare to #6 ORB 90-Degree Fitting

The #4 Male Flare to #6 ORB 90-Degree Fitting is an essential hydraulic adapter for marine fuel systems, cooling lines, and power steering applications on boats and watercraft. If you've spent years running fuel between tanks, installing new instrumentation, or upgrading your boat's hydraulic infrastructure, you know that a single failing connection compromises the entire system. This 90-degree fitting bridges two different port standards—#4 male flare and #6 ORB—allowing you to connect dissimilar line sizes and thread types without replacing entire runs of expensive marine-grade hose.

The 90-degree angle design is critical for tight engine compartments and confined bilge spaces where straight connections simply won't fit. The male flare end seals against a machined flare seat, while the ORB (O-Ring Boss) end uses a resilient elastomer ring to create a leak-free seal under pressure. This dual-seal architecture eliminates the need for thread sealant tape on the ORB side, reducing contamination risk in fuel and cooling circuits. Weighing only 0.07 lbs and measuring 2.7 x 1.25 x 4 inches, the fitting is compact enough to route through tight spaces without adding bulk to your engine bay.

Experienced boaters rely on this adapter when retrofitting fuel injection systems, upgrading cooling loops, or integrating aftermarket gauges that use different port standards than factory components. It's equally valuable for anglers who run remote fuel tanks, tournament fishermen managing multi-engine setups, and cruisers maintaining complex hydraulic steering systems. Installation is straightforward—tighten the flare nut to factory specification, and the O-ring seal handles the heavy lifting on the opposite end. Always verify line pressure ratings match your application, and confirm that both connected components can safely handle your system's operating pressure and fluid type.