3an to 1/4 NPT Adapter Fitting

The 3 AN to 1/4 NPT adapter fitting from EARLS is a precision-engineered component designed for hydraulic and pneumatic system integration in high-performance and tactical applications. This straight adapter bridges two industry-standard thread types, allowing seamless connection between 3 AN (Army-Navy) male ports and 1/4 inch NPT (National Pipe Taper) male connections. Whether you're building custom fluid transfer systems, fuel delivery circuits, or compressed air lines, this adapter eliminates the need for costly intermediate components or custom fabrication.

Constructed from lightweight aluminum and finished with black anodize coating, the 3 AN to 1/4 NPT adapter combines durability with corrosion resistance across demanding environments. The black anodized surface protects against oxidation while maintaining a professional appearance in visible installations. The straight-thread design ensures direct, leak-free connections without complex fitting arrangements, and the proven EARLS engineering standard guarantees reliable performance under pressure cycling and thermal stress. At just 0.02 lbs and compact 1.5 x 0.55 x 2.95 inch dimensions, this adapter is ideal for tight engine bay configurations or equipment-mounted fluid systems where space is at a premium.

Tactical operators, fabricators, and performance automotive enthusiasts rely on this adapter for mission-critical fluid line conversions where standard NPT infrastructure must interface with AN-threaded components. Common applications include custom coolant loops, brake fluid management, auxiliary fuel systems, and air suspension control lines. Installation requires hand tools only—no special adapters or reducer blocks needed—making field repairs and system modifications straightforward. Verify thread engagement depth and apply appropriate thread sealant (PTFE tape or anaerobic compound) to ensure maximum system integrity and prevent leakage.