Earl's Performance Stainless Steel Hardline Tube Nuts

Earl's Performance Stainless Steel Tube Nuts are precision-machined hardline plumbing components built for professional-grade fluid system construction. Machined from 304 stainless steel, these inverted flare tube nuts deliver the corrosion resistance, long-term durability, and show-quality finish that demanding automotive, racing, marine, and custom fabrication applications require.

Key Features:

• 304 stainless steel construction for superior corrosion resistance and a clean, polished appearance
• Precision-machined inverted flare design engineered for secure, leak-free connections in hardline plumbing systems
• Compatible with stainless steel, steel, and easy-form tubing for maximum versatility across build types
• Suitable for brake, clutch, fuel, transmission cooler, and hydraulic line applications
• Available in multiple AN and metric sizes to accommodate a wide range of hard tubing diameters and plumbing scenarios
• Legal for use on emissions-controlled, non-emissions-controlled, and racing-only vehicles

Aviation-Inspired. Race-Proven.

Earl's Performance Plumbing has been supplying aerospace-inspired fluid transfer technology to the automotive performance market since 1955. Founded to bring military aircraft-grade plumbing components to the racing industry, Earl's pioneered the performance aftermarket plumbing industry and remains a world-leading source for motorsport hose and fittings. Top funny car, sprint car, and Indy car teams continue to rely on Earl's plumbing — and Earl's has been represented on the vast majority of Indy 500 winners. Whether you're building a custom hardline brake system, fabricating a fuel circuit, or completing a show-quality engine bay, Earl's Stainless Steel Tube Nuts deliver the precision fitment and race-proven reliability that professionals and enthusiasts depend on.