JB U2-3 Flare to Flare Union

The JB U2-3 Flare to Flare Union is a precision-machined 3/16" SAE brass fitting designed for high-pressure refrigeration and ACR applications. Engineered by JB Industries in the USA, this union is fabricated from premium high-tensile brass to ensure a reliable, leak-proof seal between two 3/16" flare connections. This component is fully compatible with copper, brass, aluminum, steel, and appropriately flared plastic tubing, making it a versatile choice for hydraulic, marine, and refrigeration systems. With a pressure rating capable of handling up to 5,000 psi depending on the tube material and environmental conditions, it meets strict SAE J513, AHRI, and ASME standards. Veteran technicians rely on this 3/16 male flare union for its vibration resistance and dryseal taper pipe threads, which minimize leak paths in demanding HVACR environments. Its heavy-duty construction ensures structural integrity even under extreme thermal cycling and high-vacuum service.

• Durable Brass Construction: Machined from high-quality C360/C370 brass for maximum corrosion resistance and mechanical strength.
• Multi-Tube Compatibility: Seamlessly integrates with 3/16 inch OD copper, aluminum, and steel hydraulic or refrigeration tubing.
• High-Pressure Performance: Designed to withstand system pressures up to 5,000 psi, ensuring reliability in mission-critical refrigeration circuits.
• Standard Compliance: Conforms to SAE J513 and AHRI guidelines to guarantee consistent seating and proper sealing surfaces.

• What torque is required for a 3/16" flare union? For a standard 3/16" flare, it is recommended to tighten the nut approximately 1/6 to 1/4 turn past hand-tight to ensure a solid seal without thinning the copper.
• Can this be used with R-410A systems? Yes, though the 3/16" size is typically found in specialized instrumentation or older refrigeration units; always verify your line set dimensions before installation.
• Is thread sealant necessary on the flare threads? No, flare fittings rely on the mechanical mating of the flared tube and the brass cone; never apply Teflon tape or pipe dope to the flare threads.

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.