JB N5-6 3/8" SAE Fitting Cap

The JB Industries N5-6 is a professional-grade 3/8" SAE flare cap engineered for high-pressure sealing in HVACR systems. This heavy-duty flare fitting cap features a precision-machined 3/8 inch flare nut profile that ensures a leak-proof termination on male flare threads. Designed for use with copper, brass, aluminum, and steel tubing, it provides a robust mechanical seal without the need for additional gaskets or sealants. Its heavy-wall construction is ideal for vacuum applications and refrigerant recovery, maintaining system integrity under extreme pressure differentials. Whether you are capping off a manifold port or sealing a line set during a pressure test, this brass flare cap offers the durability required for field service. The 5/8-18 thread pitch is manufactured to exacting tolerances, preventing cross-threading and ensuring compatibility with standard HVAC flare fittings and refrigeration charging equipment.

• Universal Compatibility: Seamlessly integrates with 3/8 flare connections on copper, brass, and plastic tubing.
• Leak-Proof Seal: Precision-machined internal flare face provides a metal-to-metal seal against refrigeration flare fittings.
• Heavy-Duty Construction: Built to withstand high-vibration environments and extreme temperature swings common in AC systems.
• Vacuum Rated: Suitable for deep vacuum pull-downs, ensuring no ambient air ingress during system evacuation.

Is this cap compatible with R-410A systems?
Yes, the heavy-wall design of the JB N5-6 is rated for the higher operating pressures associated with R-410A refrigeration and air conditioning systems.

Does this require a copper crush washer?
No, this is a standard SAE 45-degree flare cap designed to seal directly against the male flare seat, though a drop of refrigeration oil on the threads is recommended for the best seal.

Will this fit a standard 3/8" service valve?
As long as the service valve uses a standard 3/8" SAE flare thread (5/8-18 UNF), this component will provide a secure, airtight fit.

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.