3/8-24 to #3 Stl Female to Male Adapter (Pr)

The 3/8-24 to #3 steel female to male adapter pair from XRP-Xtreme Racing Products delivers the precise port connections serious boaters and anglers need when upgrading fuel lines, hydraulic systems, or cooling circuits on marine engines. Whether you're retrofitting a high-performance outboard or rebuilding a vintage inboard's fuel delivery system, this straight adapter bridges incompatible fitting sizes without compromising flow integrity or safety. Designed for those who demand reliability under demanding saltwater and freshwater conditions, these adapters ensure tight, leak-free connections that hold up to vibration, thermal cycling, and years of hard use on the water.

Constructed from nickel-plated steel, the 3/8-24 to #3 AN male adapter pair resists corrosion in marine environments while maintaining structural integrity under pressure and temperature extremes. The inverted flare female end (3/8-24 thread) mates with standard -3 AN hardline tubing (3/16 inch ID), creating a sealed connection that accommodates 3/16 inch hardline without requiring bulky fittings or reducers. The nickel plating not only guards against rust and oxidation but also simplifies visual inspection for wear or damage during routine maintenance. Each adapter is precision-machined to OEM tolerances, ensuring repeatable fitment across paired applications—critical when plumbing multiple fuel or cooling circuits where consistency prevents pressure drops and flow restrictions.

Marine technicians, performance boaters, and anglers upgrading fuel systems or hydraulic brake lines will appreciate the versatility of this pair—one set covers both port and starboard installations or allows simultaneous upgrades on dual-engine rigs. Installation is straightforward: hand-tighten first, then secure with a wrench, taking care not to over-torque the inverted flare connection. These adapters work seamlessly with XRP hardline tubing and are ideal for custom builds, engine swaps, or restoration projects where OEM fittings no longer exist or don't match modern specification standards. Always inspect the connection under load before extended operation to confirm proper sealing.