JB T3-5B 5/16 x 1/4 x 5/16 Brass Tee

The JB T3-5B Brass Tee is a high-performance HVAC refrigeration fitting engineered for primary service access and system manifolding. This 5/16 SAE x 1/4 MPT x 5/16 SAE brass tee is precision-machined in the USA from premium C360 brass, ensuring a minimum of 65% copper content for superior tensile strength and corrosion resistance. Designed to meet SAE J513 standards, this fitting features long dryseal pipe threads that maximize clearance for flare nuts while providing a leak-proof seal even in high-vibration ACR applications. It is rated for vacuum and high-pressure environments up to 5,000 psi, though effective working limits are often governed by the valve core. This forged brass component eliminates the risk of stress cracking common in lower-quality imports, making it a reliable choice for refrigerant line maintenance and diagnostic port installation.

• High-Copper Brass Alloy: Forged from 65% copper and 35% zinc to prevent seasonal cracking and thrive in harsh HVACR environments.
• Precision Machined SAE Threads: 5/16 male flare and 1/4 MPT connections specifically sized for compatibility with modern mini-split and refrigeration systems.
• Vibration-Resistant Design: Deep-seated threads and heavy-duty wall thickness provide a stable "make and break" connection that withstands compressor cycling.
• Multi-Tube Compatibility: Provides a secure seal on copper, aluminum, steel, and plastic tubing when paired with a standard 45-degree flare.

Common Questions What is the maximum pressure rating for the JB T3-5B? The forged brass body is capable of handling up to 5,000 psi; however, when used as an access valve with a core, the operational pressure is typically limited by the core's rating, often around 800 psi. Is this fitting compatible with R-410A systems? Yes, the 5/16" SAE flare size is frequently utilized in R-410A mini-split service ports, and the high-tensile brass construction is ideal for high-pressure refrigerant cycles. How should I ensure a leak-free seal on the MPT connection? For the 1/4 MPT center port, technicians should apply a compatible thread sealant and tighten the fitting 2-1/2 turns past hand-tight to engage the dryseal taper.

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.