Hose Fitting #4 Straight Push Lock

The Hose Fitting #4 Straight Push Lock from FRAGOLA is a precision engineered AN hose adapter built for high-performance fuel and coolant system applications where reliability under pressure is non-negotiable. Designed for mechanics and performance enthusiasts who demand leak-free connections in modified engine bays, this 4 AN fitting serves as the critical bridge between your custom hose assemblies and hard-line system components. Whether you're building a fuel injection system, upgrading to a power steering cooler, or routing custom coolant lines on a naturally aspirated or turbocharged engine, a quality push-lock fitting eliminates the guesswork and repeated failures that come with inferior adapters.

The 8000 Series Push-Lite design features a straight-through geometry with a 4 AN hose barb on one end and 4 AN female port on the other, allowing direct integration into manifold blocks, fuel rails, or modular hard-line systems without the bulk of traditional AN elbows. Machined from aluminum and finished in blue anodize, this fitting combines weight savings with corrosion resistance—critical for underhood environments exposed to heat cycling and moisture. The push-lock mechanism provides positive engagement without the threading requirement of traditional swaged fittings, reducing installation time while maintaining consistent hose sealing across fluctuating system pressures.

This fitting works best in custom fuel systems, auxiliary cooling loops, and performance plumbing where AS4 AN-sized hose is already specified in your build. Installation requires compatible 4 AN hose with internal barb sizing matched to this fitting's specifications; verify hose ID before assembly to ensure the push-lock collar seats fully around the barb. The compact footprint (1.9 x 1.05 x 4.3 inches) and lightweight profile (0.04 lbs) make it ideal for tight engine bay layouts where space constraints rule out bulkier adapter configurations. Use with standard AN hose clamps rated for your system pressure to complete a reliable, professional-grade connection.