8an Male to 8an Female w/ 1/8npt Hex

The 8AN Male to 8AN Female with 1/8 NPT Hex fitting from REDHORSE Performance is a precision hydraulic adapter engineered for custom fuel, oil, and coolant line systems in high-performance automotive builds. This adapter serves as a critical junction point in modified engine bays where space constraints and routing complexity demand reliable threaded connections that won't weep or fail under pressure. Whether you're fabricating a custom fuel system for a turbocharged engine, plumbing a remote oil cooler setup, or integrating a custom transmission cooling circuit, this adapter provides the versatility needed to transition between different connection standards without compromising system integrity.

Constructed with precision engineering, the 8AN Male to 8AN Female with 1/8 NPT Hex fitting features a 1/8-inch NPT (National Pipe Thread) port that allows simultaneous fluid monitoring, pressure gauge installation, or vent/return line routing without requiring additional fittings. The hex body design enables secure installation with standard wrenches, preventing fitting rotation and reducing the risk of leaks at critical joints—essential when working with -8 AN hose assemblies that carry fuel at 5–10+ PSI or oil under sustained engine load. REDHORSE Performance's quality standards ensure tight tolerances and smooth internal passages that maintain proper flow rates across all three ports while minimizing turbulence and heat generation.

This adapter is ideal for serious enthusiasts, professional fabricators, and race-oriented shops building custom fuel delivery systems, engine oiling circuits, or cooling loops where OEM hard lines and factory fittings no longer apply. Its compact 3.8 x 1.05 x 3.95-inch footprint and lightweight 0.1 lbs make it suitable for confined engine compartments without adding bulk, while the -8 AN sizing maintains compatibility with premium aftermarket hoses rated for high-flow applications and elevated pressures. Installation is straightforward: apply thread sealant to NPT threads, secure the 8AN connections with appropriate line wrenches, and torque the hex body to prevent loosening under vibration—a standard practice in motorsport fuel system assembly.