16AN STR Male Adapter 1in NPT Male Blue

The 16AN STR Male Adapter 1in NPT Male Blue from REDHORSE PERFORMANCE is an essential fitting for any serious fuel system, coolant line, or hydraulic brake upgrade on custom vehicles. This straight adapter bridges the gap between AN (Army-Navy) hose standards and NPT (National Pipe Thread) port connections, making it indispensable when retrofitting aftermarket fuel rails, coolers, or pressure regulators onto OEM or modified engine blocks. Whether you're building a carbureted hot rod, upgrading a turbo fuel system, or installing a remote fluid filter setup, this adapter ensures leak-free, pressure-rated connections in high-flow applications.

The 16AN port accepts standard braided steel or PTFE hose rated for fuel, oil, and coolant transfer, while the 1-inch NPT male thread locks securely into engine block bungs, manifold ports, or component bosses with wrench-friendly hex shoulders. The blue anodized aluminum body provides corrosion resistance and heat dissipation in underhood environments, while the precision-machined geometry prevents turbulence and maintains fuel or coolant flow integrity under sustained boost or high RPM conditions. This fitting is compact at 2.8 x 1.4 x 3.75 inches and weighs only 0.17 lbs, minimizing clutter in tight engine bays while maintaining full structural rigidity and vibration dampening.

Mechanics and enthusiasts upgrading fuel delivery systems, oil cooler circuits, or custom cooling loops will appreciate the direct 1-inch NPT compatibility with most LS, small-block Chevy, and modern Ford block ports without requiring bulky step-down adapters. Installation requires a wrench on the hex body and a pipe thread sealant (Teflon tape or liquid) on the NPT side; the straight configuration eliminates elbows, reducing pressure drop and simplifying hard-line routing in confined spaces. Verify your hose barb size matches 16AN (nominally 1 inch OD) and confirm NPT port depth before assembly to ensure a flush, leak-free fit under all operating pressures.