#16 Flare #12 Flare Reducer Black

The #16 Flare #12 Flare Reducer Black (AEROQUIP FCM5170) is a precision hydraulic adapter designed for vehicle enthusiasts and mechanics who demand reliable fluid system connections when downsizing between larger and smaller AN-spec fittings. This straight reducer fitting steps down from 16 AN male to 12 AN male, making it essential for custom fuel, oil, coolant, or brake line modifications where space constraints or component compatibility require a stepped connection. Whether you're building a high-performance engine bay, fabricating custom fuel cell plumbing, or integrating aftermarket hydraulic components, this adapter ensures leak-free performance under demanding conditions.

Machined from aluminum and finished in durable black anodizing, the #16 Flare #12 Flare Reducer delivers corrosion resistance and a professional appearance in engine bays and chassis applications. The straight-port design minimizes turbulence and pressure loss compared to 90-degree or elbow configurations, critical when routing fluids through compact fabrication layouts. AEROQUIP's AN-spec construction ensures both fittings feature industry-standard 37-degree flare angles, guaranteeing a precise, repeatable seal without tape or sealant—a non-negotiable requirement for high-pressure fuel and brake systems where failure is not an option. The compact 3.5 x 1.8 x 5.3-inch footprint and lightweight 0.19 lbs make it ideal for weight-conscious builds and tight engine compartment installations.

Mechanics and fabricators standardly employ the #16 Flare #12 Flare Reducer when transitioning between oversized hard-line fuel systems and smaller pump inlets, or when integrating aftermarket regulators, filters, or coolers into OEM or custom harnesses. This adapter is equally at home in street rods, track cars, drag builds, and off-road platforms where modular plumbing systems demand flexibility. Verify your specific line sizes and flare type (SAE 37-degree) before installation to ensure compatibility with existing components. Stock this AEROQUIP FCM5170 adapter in your shop as an essential connector for any serious hydraulic system upgrade or repair.