1/8 FPT Coupler Fitting Black

The FRAGOLA 1/8 FPT Coupler Fitting in Black is a straight-through adapter designed to connect two 1/8-inch NPT female ports. Built from anodized aluminum, this compact coupler provides a reliable, corrosion-resistant connection for fluid and pneumatic systems across automotive, hydraulic, and industrial applications. The black anodized finish protects against oxidation while delivering the clean aesthetic preferred in modern engine bay and equipment setups.

This female-to-female fitting is engineered for straightforward installation where two existing 1/8 NPT female connections need to be joined without reducing port size. The aluminum construction keeps weight minimal—just 0.02 lbs—while maintaining structural integrity under normal operating pressures. The 1/8-inch NPT thread standard ensures compatibility with a wide range of aftermarket and OEM components, including fuel system adapters, air lines, coolant circuits, and lubrication distribution blocks. The anodized black coating resists weathering and corrosion, making it suitable for both sealed engine compartments and exposed outdoor equipment.

Technicians and builders working on fuel injection systems, turbo plumbing, custom water cooling loops, and pneumatic control circuits rely on FRAGOLA couplers for their thread accuracy and consistent fit. This fitting is ideal for situations where port extension or quick reconfiguration is needed without splicing hoses or fabricating custom adapters. Whether consolidating multiple 1/8 NPT ports into a single connection point or replacing a worn coupler in an existing system, this straightforward adapter eliminates complexity and delivers leak-free performance.