4AN/JIC Straight O-Ring Port Plug Black

The REDHORSE PERFORMANCE 4AN/JIC Straight O-Ring Port Plug Black (814-04-2) is a high-pressure hydraulic and fuel system fitting designed to seal port connections in performance racing, off-road recovery, and industrial hydraulic applications. This hex-head aluminum plug delivers reliable, leak-free closure for 4 AN ports in systems demanding aerospace-grade reliability and corrosion resistance.

Constructed from aluminum and finished in black anodized coating, this straight port plug features an O-ring seal that ensures pressure-tight performance across a wide temperature range. The 4 AN sizing (1/4-inch nominal) accommodates moderate-to-high flow rates while remaining compact. The hex head allows wrench engagement for positive installation and removal without stripping. Black anodized finish provides both corrosion protection and a professional appearance in custom engine bays and hydraulic manifold assemblies. The O-ring design allows for proper sealing without requiring additional thread sealant—critical in systems where fluid compatibility and contamination control matter.

This fitting is ideal for drag racers, off-road builders, and hydraulic technicians who need reliable port closures in custom fuel rails, power steering circuits, and auxiliary cooling loops. The AN/JIC straight configuration works with standard hose adapters and manifold ports found across racing and industrial equipment. Each plug ships as a single unit and integrates seamlessly into systems already using REDHORSE Performance adapters and fittings, which are recognized in motorsports for precision manufacturing and consistent thread tolerances.

AN (Army-Navy) and JIC (Joint Industry Council) fittings are industry-standard across racing, aerospace, and heavy equipment applications. The 4 AN designation appears in virtually all modern performance fuel systems and allows mixing with adapters and hoses from any compliant manufacturer. Choosing REDHORSE ensures compatibility with competition-grade components and the confidence that port sealing won't fail under pressure cycling or thermal stress.