6AN Male to M14x1.5 O-Ring Aluminum Clear

The 6AN Male to M14x1.5 O-Ring Aluminum Clear fitting from REDHORSE PERFORMANCE is a precision hose adapter engineered for high-performance fuel and fluid system applications. Whether you're building a custom fuel rail, upgrading a forced-induction fuel delivery system, or fabricating a complex fluid management setup, this adapter provides the critical transition between AN-rated hose assemblies and metric O-ring port connections. Modern turbocharged and supercharged engine builds rely on these fittings to create leak-free, high-pressure fuel pathways that maintain system integrity under load.

Constructed from lightweight aluminum with clear anodize finish, this fitting combines durability with corrosion resistance in underhood environments. The 6AN male thread (a 37-degree JIC flare standard) mates with industry-standard braided stainless steel or nylon AN hose, while the M14x1.5 metric O-ring port accepts sealed O-ring boss components commonly found on aftermarket fuel pressure regulators, filters, and distribution blocks. The O-ring design eliminates reliance on tapered seat compression, instead using a captured elastomer seal for superior vibration damping and consistent clamping force—critical when managing fuel system pressure spikes during acceleration or boost transitions.

Engine tuners and performance fabricators benefit most from this adapter when retrofitting late-model fuel systems or designing fuel rails for LS, EFI-swapped, or turbocharged builds where metric ORB connections dominate fuel system components. Its compact 2.5-inch overall length and 0.055-pound weight ensure minimal packaging constraints in tight engine bays. Installation requires standard wrench or hose-end tool engagement; proper O-ring seating and snug (not over-torqued) connection prevent weeping under sustained high-pressure operation, typically found in 40–85 PSI fuel systems common to direct-injection and forced-induction platforms.