JB B2-4 1/4" SAE Gasket

The JB B2-4 is a professional-grade 1/4" SAE copper flare gasket engineered to establish an airtight, positive seal in high-pressure HVACR systems. Designed specifically for brass-to-brass or brass-to-steel connections, these soft copper flare gaskets act as a sacrificial sealing surface, conforming to the flare's irregularities to eliminate refrigerant leaks. Manufactured in the USA by JB Industries, each leak-proof gasket is constructed from high-purity copper that provides excellent thermal conductivity and corrosion resistance, ensuring long-term system integrity even under extreme vibration or thermal cycling. These gaskets are rated to handle vacuum pressures up to 5,000 PSI and are fully compliant with SAE J513 standards for refrigeration service. For veteran technicians, the B2-4 is a critical component for 45-degree flare installations where mechanical over-tightening might otherwise lead to flare thinning or fatigue. Using refrigeration flare gaskets prevents call-backs by ensuring a true metal-to-metal seal that holds steady across diverse industrial and residential applications.

• Metal-to-Metal Sealing: High-purity soft copper conforms to the flare surface for an airtight 1/4" SAE gasket connection.
• Extreme Pressure Rating: Capable of handling up to 5,000 PSI, making it suitable for both high-side and low-side refrigeration lines.
• Standard Compliance: Precisely machined to meet SAE J513 and ARI standards for hydraulic and refrigeration service.
• Vibration Resistance: Serves as a buffer to maintain seal integrity in systems with high mechanical resonance.
• Versatile Application: Ideal for copper, brass, and steel tubing where a traditional flare connection requires additional security.

Do these gaskets require thread sealant during installation?
While the copper gasket provides the primary mechanical seal, many technicians apply a small drop of compatible refrigeration oil or a high-quality thread sealant to the back of the flare to facilitate proper torque without binding.

Can these gaskets be reused after a fitting is disconnected?
No. These are designed as sacrificial components that deform to create a seal. To ensure a leak-proof connection, always replace the gasket once the flare nut has been loosened.

Are these compatible with all refrigerant types?
Yes, the high-grade copper construction is chemically compatible with all standard synthetic and mineral-based refrigerants and oils used in the HVACR industry.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.