SKU: AERFCM2279
UPC: 678146012135
MPN: FCM2279
The #8 to 3/8in NPT Straight Adapter with 1/8in NPT Port by AEROQUIP is a critical hydraulic and pneumatic system component designed for professional mechanics and automotive builders managing fluid or air line transitions. This adapter solves a common challenge in custom engine builds, fuel systems, and aftermarket cooling solutions where hose sizes don't align directly. Whether you're routing hardline fuel systems in a high-performance engine bay, integrating auxiliary cooling circuits, or connecting diagnostic ports in modified turbocharged applications, this fitting ensures leak-free connections across different line standards.
Constructed by AEROQUIP—a trusted manufacturer of hydraulic fittings for racing and industrial applications—this straight adapter transitions from a #8 AN line (common in fuel and brake systems) to 3/8-inch NPT male threads while incorporating an additional 1/8-inch NPT port for secondary system monitoring or component branching. The straight design minimizes pressure drop and flow turbulence compared to elbow fittings, making it ideal for primary fuel delivery or cooling lines where efficiency matters. The NPT (National Pipe Thread) ports allow compatibility with gauges, sensors, or distribution blocks typical in fuel injection tuning and custom cooling setups. Weighing just 0.08 lbs and measuring 2.3 × 1.2 × 3.7 inches, the compact form factor fits tight engine compartments without sacrificing durability or reliability.
This fitting serves experienced fabricators, fuel system integrators, and performance shops building custom fuel rails, intercooler circuits, or auxiliary cooling systems where precision plumbing meets motorsports demands. The auxiliary 1/8-inch NPT port is especially valuable for tapping pressure transducers or boost-referenced fuel regulators into main lines without introducing additional bulkhead fittings. Proper thread sealant (PTFE tape or aviation-grade sealant) on NPT ports ensures vibration-resistant sealing in high-vibration engine environments. Installation requires standard hose crimpers for the #8 AN side and a wrench for NPT connection; verify system pressure ratings (typically 3000+ psi for AEROQUIP fittings) match your application before deployment.
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