Earl's Performance Steel AN to Metric Bump O-Ring Adapter Fittings

Earl's Performance Steel AN to Metric Bump O-Ring Adapter Fittings deliver a dependable, leak-free solution for connecting AN (Army-Navy) fluid lines to metric-threaded ports. Whether you're building a custom fuel system, upgrading power steering plumbing, or routing oil and coolant lines in a high-performance engine bay, this adapter series provides the precision and sealing integrity that professional builders and racers demand.

The bump-style O-ring sealing design creates a positive, pressure-resistant seal at the mating surface—eliminating the need for thread-sealing compounds and the risk of weeping connections common with inferior hardware. All-steel construction with protective zinc plating resists corrosion over the long term, making these adapters equally well-suited to daily-driven builds and full competition applications alike.

Key Features:

• All-steel construction with zinc plating for reliable, long-lasting corrosion resistance
• Bump O-ring sealing design ensures a positive, leak-free seal at high operating pressures
• AN male to metric male thread configuration bridges AN plumbing to metric-ported components
• Broad fluid system compatibility — suitable for fuel, power steering, oil, and coolant circuits
• Available in multiple size configurations to suit a wide range of AN and metric port combinations
• Made in the USA to Earl's exacting dimensional and quality standards
• Legal for use on emissions-controlled, non-emissions-controlled, and racing-use-only vehicles

Typical Applications:

• Power steering pump and rack plumbing
• Fuel injection and carburetor feed/return systems
• Engine oil circuit connections
• Custom engine swap and fabrication builds

Earl's Performance has been at the forefront of automotive performance plumbing since 1955, bringing aviation-grade fluid transfer technology to the racing and performance aftermarket. This series of steel bump O-ring adapters upholds that legacy of precision engineering and race-proven reliability. Select the correct size configuration for your application from the available variants.