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The PARKER 4-4 CBZ-B is a brass compression tube male elbow fitting designed to connect 1/4-inch OD tubing to a male NPT threaded port at a 90-degree angle. Manufactured from brass meeting ASTM-B-124 and BS2872 standards, it is built to handle a maximum working pressure of 3500 psi. The compression x MNPT end configuration allows fast, reliable tube connections without soldering or specialized tooling. Plumbers, HVAC technicians, and industrial piping mechanics install this fitting in instrumentation, refrigeration, and fluid control systems where a direction change and thread-to-tube transition is required.
This fitting is suited for residential and light commercial plumbing, HVAC refrigerant lines, pneumatic instrument tubing, and hydraulic control circuits where 1/4-inch OD tubing meets a male NPT port. It is commonly used in tight-space installations where an inline union fitting would be impractical. The 90-degree elbow geometry reduces stress on tubing runs that must change direction at a panel, valve, or instrument port.
Designed as an OEM-style compression fitting for systems using 1/4-inch OD tubing with male NPT threaded connections. Cross-references to Swagelok part number B-400-2-4.
Installation is performed by licensed plumbers or qualified HVAC and instrumentation mechanics. Shut off system pressure and depressurize the line before removing or installing any compression fitting. Hand-tighten the compression nut, then advance with a wrench per standard compression fitting practice — do not overtighten, as brass ferrules can deform and cause leaks. Verify the fitting is rated for the fluid type and pressure range of the specific application before putting the system back into service.
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