Plug St Thread #6

The Plug St Thread #6 is a precision-engineered aluminum fitting designed for high-performance fuel and fluid systems in marine engines and racing applications. Built by XRP-XTREME RACING PROD., this compact hex-head plug delivers the reliability seasoned boaters and engine builders demand when managing critical pressure lines. Whether you're maintaining a center console, offshore tournament rig, or performance inboard, this fitting ensures leak-free connections where safety and durability matter most.

Manufactured from blue anodized aluminum, the Plug St Thread #6 features an integral O-ring seal that provides superior fluid containment under pressure and vibration—critical factors in marine environments where corrosion and thermal cycling accelerate failure. The #6 AN (size) designation and ST (straight) thread configuration ensure compatibility with standard marine hose assemblies and fuel delivery systems. The hex head design allows for simple wrench installation and removal, minimizing downtime during service intervals. Blue anodization protects against saltwater corrosion and extends service life in demanding offshore conditions.

This plug suits fuel system termination points, bypass lines, and test port closure on inboard engines, outboard fuel rails, and closed-loop cooling systems. Boaters who run high-horsepower applications or frequent saltwater environments benefit most from XRP's aircraft-grade construction and proven track record in racing fuel systems. Installation is straightforward—hand-tighten first, then use a wrench to snug the hex head without over-torquing. Always pair with compatible AN hose and fittings to ensure system integrity and comply with marine fuel system standards.