#8 Port Plug 3/4-16 Black w/ 1/8 FPT Port

The #8 Port Plug 3/4-16 Black with 1/8 FPT Port is a precision hydraulic or pneumatic system component designed for custom engine builds, fuel system installations, and performance suspension setups. Whether you're upgrading a high-horsepower engine, configuring a fuel injection system, or installing hydraulic steering or braking lines, this FRAGOLA adapter serves as a critical sealing interface. Port plugs prevent unwanted fluid leakage and maintain system integrity in demanding automotive applications where vibration, pressure cycling, and temperature variation are constant challenges.

Built to FRAGOLA's exacting standards, the #8 Port Plug features a 3/4-16 thread pitch—a common metric in SAE AN fittings—with a secondary 1/8 inch female pipe thread (FPT) port for future line routing or gauge installation. The black anodized finish resists corrosion and blends seamlessly into engine bay aesthetics while providing durable protection against fuel, oil, coolant, and road salt exposure. At just 0.05 pounds and compact dimensions (1.3 x 1.1 x 4.35 inches), this plug integrates cleanly into tight spaces typical of modern turbo, supercharger, and custom fuel rail configurations without adding bulk or complexity.

Mechanics and enthusiasts building LS, EFI, or rotary engine swaps rely on FRAGOLA port plugs to finalize fuel, oil, and coolant circuits without leaving open ports that invite contamination or system failure. The 1/8 FPT auxiliary port allows future upgrades—such as fuel pressure or oil temperature sensors—without requiring complete system disassembly. This adapter is essential for anyone finishing a professional engine build, transitioning from carbureted to fuel-injected power, or upgrading hydraulic steering and brake components on track or street vehicles.