JB NS4-8 1/2" SAE Brass Flare Nut

The JB NS4-8 1/2" SAE Brass Flare Nut is a heavy-duty, short type forged flare nut engineered for high-pressure refrigeration and ACR systems. Machined in the USA from premium C360 and C370 brass, this 1/2" flare nut features a 65% copper content that provides superior tensile strength and resistance to stress corrosion cracking. The forged brass construction eliminates the structural integrity issues often found in cast or low-quality imported fittings, making it a reliable choice for HVAC/R technicians working on ductless minisplits and commercial refrigeration units. This SAE 45-degree flare fitting is designed for a precise fit on copper, brass, aluminum, and steel tubing. It meets strict SAE J513 and AHRI standards, ensuring a leak-proof metal-to-metal seal capable of handling vacuum and pressures up to 5,000 PSI under optimal conditions. The short nut design is ideal for tight clearances where a standard long nut may interfere with surrounding components or cabinetry.

• Forged Brass Strength: Superior to bar stock or cast fittings for preventing cracks under high torque or vibration.
• Corrosion Resistance: High-copper alloy ensures long-term reliability in harsh environments.
• Multi-Material Compatibility: Works seamlessly with copper, aluminum, and steel tubing once an acceptable flare is generated.
• Precision Threading: Manufactured to SAE, ASA, and ASME standards for consistent 1/2" SAE connections.
• Compact Form Factor: Short type design facilitates easier installation in confined service ports and manifolds.

• What is the maximum pressure rating for this 1/2" flare nut? While the fitting is rated up to 5,000 PSI depending on tube material, the system's working pressure is often limited by the valve core or the tubing thickness.
• Can I use this nut with R410A systems? Yes, the forged brass construction and high-tensile strength are specifically intended for high-pressure refrigerants like R410A.
• Is thread sealant required? For a 45-degree flare connection, the seal is created by the metal-to-metal contact of the flare; however, a drop of refrigerant oil or a specialized lubricant like Nylog helps prevent binding during tightening.

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.