JB N5-8 1/2" SAE Fitting Cap

For field technicians needing a reliable secondary seal, the JB Industries N5-8 is a heavy-duty 1/2" SAE flare fitting cap engineered for demanding HVACR service. Machined in the USA from premium high-tensile brass (65% copper, 35% zinc), this 1/2 inch flare cap provides a robust metal-to-metal seal that resists cracking and atmospheric corrosion. Unlike lower-quality imports, the forging process used in these brass flare fittings ensures structural integrity under extreme conditions, withstanding pressures up to 5,000 PSI and deep vacuum applications depending on the system environment.

This refrigeration flare cap is designed for universal compatibility with copper, brass, aluminum, and steel tubing, making it a staple for manifold gauge sets, recovery cylinders, and system access ports. The long dryseal threads provide maximum clearance for flare nut tightening, ensuring a leak-proof interface even in high-vibration regional installations. Whether you are performing a pressure test or sealing off a line set, the JB N5-8 meets SAE J513 standards, providing the mechanical reliability required by veteran contractors for long-term system performance.

• High-Pressure Performance: Engineered to handle hydraulic and refrigeration pressures up to 5,000 PSI.
• Premium Brass Construction: Forged from C360/C370 brass to eliminate porosity and prevent stress fatigue.
• Vibration Resistance: Heavy-duty design maintains seal integrity in high-movement mechanical environments.
• Universal Material Utility: Safely integrates with plastic, steel, and non-ferrous metal tubing.
• American Made Quality: Precision-machined by JB Industries to strict SAE, ASA, and AHRI standards.

• Does this cap require a gasket for a vacuum-tight seal? This is a heavy flare cap designed for a metal-to-metal mechanical seal. While it provides a secure closure, technicians often use a compatible thread sealant for 2-1/2 turns past hand-tight to ensure a 100% leak-proof connection in deep vacuum.
• Is this compatible with R-410A systems? Yes, the high-tensile brass construction is suited for high-pressure refrigerants, including R-410A and R-32, provided the flare is properly formed.
• Can this be used on automotive A/C lines? If the connection is a standard 1/2" SAE (45-degree) flare, this cap is fully compatible with automotive, marine, and industrial fluid transfer systems.

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.