#3 > 1/8 Npt Steel

The EARLS #3 to 1/8 NPT Steel straight adapter fitting (model 961603ERL) is a precision-engineered AN to NPT conversion connector designed for hydraulic and pneumatic line integration in high-performance applications. This steel adapter enables seamless connection between 3 AN male ports and 1/8 inch NPT male threaded systems, making it essential for custom fuel systems, brake lines, transmission coolers, and air suspension configurations where metric AN standards must interface with standard NPT metric threads.

Constructed from zinc-plated steel, this adapter provides corrosion resistance critical in under-hood and exposed environments where salt spray, moisture, and temperature cycling pose oxidation risks. The straight configuration eliminates offset or angular deflection, ensuring direct flow paths and reducing turbulence at connection points. The zinc plating also facilitates visual inspection—corrosion breakthrough appears clearly, signaling maintenance intervals before catastrophic failure. At just 0.03 lbs and measuring 2.15 x 0.75 x 2.4 inches, the compact form factor integrates into tight engine bays and frame-mounted plumbing without requiring additional standoffs or brackets.

This fitting serves builders and technicians modernizing carburetor fuel delivery systems, upgrading mechanical fuel pumps to electric systems, installing aftermarket air conditioning lines, and fabricating custom transmission cooler circuits. The AN-to-NPT adapter bridges the gap between precision AN line systems (which dominate racing and high-flow applications) and legacy NPT-threaded ports found on classic engines, cylinder heads, and manifolds. Proper thread sealant application—either PTFE tape or anaerobic thread locker—is required to ensure leak-free operation and prevent system pressurization loss.