JB U1-6B 3/8" SAE x 1/4" MPT Adapter

The JB Industries U1-6B is a precision-machined half union adapter designed for high-pressure HVACR applications. Featuring a 3/8" SAE flare by 1/4" MPT connection, this brass flare fitting provides a reliable, leak-proof transition from flare to pipe thread. Engineered from heavy-duty brass, it ensures structural integrity when working with copper, brass, aluminum, and steel tubing. This HVAC flare adapter is essential for technicians managing refrigerant line connections where a secure mechanical seal is required without the need for brazing. The deep-seated threads and consistent hex sizing allow for proper torque application, preventing stripping during field installation. Designed for durability in high-vibration environments, this SAE to NPT fitting meets the rigorous demands of professional refrigeration system maintenance and repair. Its corrosion-resistant material properties make it compatible with various fluid types, ensuring long-term performance in diverse mechanical systems.

Technical Specifications and Benefits

• Precision Machined: Ensures a perfect 45-degree SAE flare seat for metal-to-metal sealing.
• Material Compatibility: Suitable for use with copper tubing, aluminum, and plastic piping.
• Industrial Durability: Solid brass construction resists fatigue and stress corrosion cracking.
• Standardized Sizing: 3/8" flare to 1/4" male pipe configuration fits standard manifolds and charging ports.
• High Pressure Rated: Engineered to maintain seal integrity under standard refrigeration vacuum and pressure ranges.

Common Technical Questions

Can this adapter be used for permanent refrigerant lines?
Yes, the JB U1-6B is a standard HVARC component for creating reusable, mechanical joints in refrigerant lines, provided the flare is properly formed.

Does this fitting require thread sealant on the flare side?
No, the 3/8" SAE flare side relies on a mechanical compression seal. However, the 1/4" MPT side requires a compatible sealant to ensure a gas-tight connection.

Is this compatible with R-410A systems?
Yes, as long as the system pressure does not exceed the rated limits of the brass fitting and the flare is executed to professional standards.

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.