JB B2-10 5/8" SAE Gasket

The JB B2-10 5/8" SAE Gasket is a critical component for ensuring leak-proof refrigeration service connections in high-pressure environments. Engineered from premium-grade copper material, these conical gaskets are designed specifically for 5/8" SAE flare fittings, providing a soft-seat seal that conforms to surface irregularities between brass-to-brass or brass-to-steel interfaces. This metal-to-metal sealing capability is essential for HVACR technicians dealing with ACR tube fittings where vibration and thermal expansion can compromise standard connections.

Manufactured in the USA to SAE J513 standards, the B2-10 is compatible with copper, brass, aluminum, steel, and plastic tubing, provided a standard 45-degree flare is present. These gaskets are rated for use in systems handling up to 5,000 psi, depending on the specific application and materials used. By integrating these flare gaskets into your line set or manifold connections, you effectively eliminate the "make and break" wear that often leads to refrigerant loss and costly callbacks.

Key Benefits

• High-Pressure Reliability: Capable of maintaining vacuum and pressure seals up to 5,000 psi in refrigerant systems.
• Universal Material Compatibility: Provides a secure seal for brass and copper fittings across various tubing materials including steel and aluminum.
• Vibration Resistance: The soft copper construction absorbs system harmonics, preventing the loosening of flare nuts in heavy-duty ACR applications.
• Precision Fit: Specifically sized for 5/8" OD (1/2" nominal) tubing to ensure full contact across the flare face.

Common Questions

Do these gaskets require thread sealant during installation?
While the copper gasket provides the primary seal on the flare face, using a compatible refrigerant oil or specialized sealant like Nylog on the gasket surfaces can help the material seat properly and prevent binding during the tightening process.

Can these be reused after a connection is broken?
Standard industry practice for HVAC maintenance is to replace the gasket whenever the flare nut is loosened. Because the copper deforms to create a custom seal, a used gasket may not realign perfectly, increasing the risk of a slow leak.

How much torque should be applied to seat the 5/8" gasket?
Finger-tighten the flare nut first, then apply an additional 2-1/2 turns. Over-tightening can thin the flare or crush the gasket excessively, compromising the integrity of the flare connection.

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.