Straight Adapter Fitting #4 x 1/4 MPT

The Straight Adapter Fitting #4 x 1/4 MPT by FRAGOLA is a precision hydraulic and pneumatic adapter designed to connect AN (Army Navy) and NPT (National Pipe Thread) systems in high-performance applications. This fitting bridges the gap between two industry-standard thread types, making it essential for builders and technicians working with fuel systems, brake lines, air suspension, and fluid transfer circuits. Whether you're assembling a custom hot rod, race vehicle, or industrial fluid system, this adapter ensures leak-free connections and maintains system integrity under pressure.

Constructed from lightweight aluminum and finished in blue anodized coating, the straight adapter resists corrosion while maintaining excellent strength-to-weight ratio critical in performance applications. The #4 AN (5/16-inch) male port connects to standard #4 AN hose fittings and adapters, while the 1/4-inch NPT male thread provides a secure mechanical connection to pipe-threaded components. FRAGOLA's precision manufacturing ensures tight tolerances and reliable sealing without the need for additional thread sealants, though Teflon tape or pipe dope is recommended for optimal performance in threaded connections.

Professional installers, fabricators, and motorsports enthusiasts rely on this straight adapter fitting for compatibility across mixed plumbing standards. Its compact design (3.95 inches in length) allows installation in tight engine bays and confined spaces without sacrificing accessibility. The blue anodized finish adds visual appeal while the minimal weight (0.03 lbs) ensures negligible impact on vehicle balance or system load, making it ideal for fuel injection setups, turbo systems, and custom cooling circuits where both performance and aesthetics matter.