6AN Female Swivel To 1/8NPT Male Adapter STR

The 6AN Female Swivel to 1/8NPT Male Adapter STR from REDHORSE PERFORMANCE is an essential fitting for custom fuel system builds, turbo plumbing, and precision fluid transfer applications where port sizing differs across components. This straight adapter bridges the gap between AN (Army-Navy) hose standards and NPT (National Pipe Thread) ports, making it invaluable for builders integrating aftermarket fuel rails, regulators, gauges, and engine management hardware that use mixed port standards.

The 6AN female swivel design allows for easy connection to compatible hoses, while the 1/8" NPT male port threads directly into engine blocks, fuel blocks, or manifolds without additional adapters. The swivel feature compensates for minor misalignment during installation, reducing vibration-induced wear and preventing hose chafing—critical for reliability under sustained boost or high fuel pressure.

This adapter is particularly beneficial for those upgrading carbureted engines or connecting forced-induction systems, as it eliminates the need for expensive custom machining or settling for suboptimal port conversions. REDHORSE PERFORMANCE fittings are designed with precision-machined bodies and smooth internal passages that minimize turbulence and pressure drop, essential for maintaining fuel system efficiency.