JB U1-6C 3/8" SAE x 3/8" MPT Adapter

As a veteran technician, you know the integrity of your system depends on the quality of your connections. The JB Industries U1-6C 3/8" SAE x 3/8" MPT adapter is a heavy-duty, brass flare fitting designed for high-pressure refrigeration and HVACR service. Machined in the USA from premium brass (65% copper, 35% zinc), this half union flare to male pipe thread adapter offers superior tensile strength and high corrosion resistance compared to standard import alternatives. The 3/8 inch male pipe thread end utilizes long dryseal pipe threads (NPTF) to ensure a gas-tight seal and provide additional clearance for tightening 3/8 inch SAE flare nuts. Capable of handling vacuum pressures up to 5,000 psi depending on the installation conditions, this adapter is fully compatible with copper, brass, aluminum, and steel tubing. It meets stringent SAE J513 standards, making it the professional choice for reliable, "make and break" connections in demanding fluid transfer and cooling systems.

• Heavy-Duty Brass Construction: Machined from 65/35 brass for maximum durability and resistance to mechanical pullout.
• High-Pressure Performance: Engineered to handle up to 5,000 psi, making it suitable for high-pressure ACR applications.
• Dryseal Threads: Features long NPT threads to minimize the risk of leakage and simplify HVAC fitting installation.
• Broad Material Compatibility: Specifically designed for 45-degree flare connections on copper, aluminum, and steel tubing.
• American Made: Manufactured at JB Industries' Aurora, Illinois facility to ensure tight tolerances and consistent quality.

What is the pressure rating for the JB U1-6C?
Depending on the tubing material and nut type used, these fittings are rated for vacuum pressures up to 5,000 psi. Always verify that your flare is generated correctly to maintain seal integrity.

Is this adapter compatible with A2L refrigerants?
Yes, the brass construction and SAE J513 compliance make this 3/8 flare x 3/8 MPT brass adapter compatible with modern A2L refrigerant systems and standard mineral or synthetic oils.

Should I use thread sealant on the flare end?
No, 45-degree flare connections rely on a metal-to-metal seal. Use of sealant on the flare face is not recommended, though a compatible sealant can be used on the MPT side to ensure a leak-free pipe thread joint.

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.