Labwork 5/16 Copper Nickel 25 ft Brake Fuel and Trans Line/Tubing Cupro-Nickel

What is Labwork 5/16 Copper Nickel 25 ft Brake Fuel and Trans Line/Tubing Cupro-Nickel?

Labwork 5/16 Copper Nickel 25 ft Brake Fuel and Trans Line/Tubing Cupro-Nickel is a pre-coiled, 25-foot length of cupro-nickel alloy tubing designed for high-reliability fluid transfer systems in automotive applications. Unlike standard steel brake lines, this cupro-nickel tubing offers superior resistance to corrosion, vibration, and thermal cycling, making it a preferred choice for brake, fuel, and transmission lines in both daily drivers and performance builds. With a 5/16-inch outer diameter and a wall thickness of 0.028 inches, it meets strict dimensional standards for compatibility with common flaring tools and fittings. Rated for a working pressure of 4,500 PSI and a burst pressure of 17,900 PSI, it delivers robust performance under extreme conditions.

Key features

• Material — Cupro-nickel alloy for superior corrosion and kink resistance.
• Diameter — 5/16 in. O.D. for compatibility with standard brake and fuel fittings.
• Length — 25 ft continuous coil allows for full-line replacements.
• Strength — 42,061 PSI tensile strength and 24,656 PSI yield strength.
• Pressure Rating — 4,500 PSI working pressure; 17,900 PSI burst pressure.
• Wall Thickness — 0.028 in. for optimal balance of flexibility and durability.
• Application — Suitable for brake, fuel, and transmission lines in automotive systems.

Who is Labwork 5/16 Copper Nickel 25 ft Brake Fuel and Trans Line/Tubing Cupro-Nickel for?

This tubing is ideal for DIY mechanics, auto repair shops, and restoration specialists working on vehicles requiring reliable, long-lasting fluid lines. It's especially valuable for use in environments prone to moisture or road salts, where steel lines would rust quickly. Enthusiasts building custom brake systems or upgrading fuel lines in classic or modified vehicles will appreciate its formability and durability.

How does Labwork 5/16 Copper Nickel 25 ft Brake Fuel and Trans Line/Tubing Cupro-Nickel compare?

Compared to standard zinc-coated steel brake lines, this cupro-nickel tubing offers significantly better corrosion resistance and longevity. While copper-coated steel lines provide some rust protection, they lack the inherent alloy strength and thermal stability of true cupro-nickel. It outperforms basic polypropylene or rubber hoses in high-pressure applications and is more malleable than stainless steel, making it easier to route in tight engine bays. For critical fluid systems, it strikes an optimal balance between performance, workability, and cost.