Parker 68VL-4-4 Compression Tube Connector Brass 1/4-18

Product Description

The PARKER 68VL-4-4 is a brass compression tube connector designed to join tubing to male NPT threaded ports in fluid and pneumatic systems. It uses Parker's Vibra-Lok compression style, which provides a secure, vibration-resistant bite-style grip on the tube without the need for flaring or soldering. The connector is rated to a maximum working pressure of 600 psi and is suitable for service across a temperature range of -30 degrees F to 275 degrees F. It is installed by licensed plumbers, HVAC technicians, and pipefitters working on hydraulic, pneumatic, refrigeration, or fluid transfer lines where a reliable tube-to-thread transition is required.

The 68VL-4-4 is suited for residential and light commercial applications involving tubing connections to threaded ports on valves, manifolds, and instrumentation. The Compression x MNPT end configuration allows direct connection from soft copper, aluminum, or plastic tubing on one end to a 1/4-18 male NPT threaded fitting or port on the other. It is a single-piece connector appropriate for tight-space installations where a straight inline fitting is needed. It meets ISO 6149 and SAE J1926 standards, making it appropriate for use in systems that require compliance with those specifications.

Key Features

• Vibra-Lok compression style — no flaring or soldering required for tube end
• Rated to 600 psi maximum working pressure
• Brass construction for corrosion resistance in fluid and pneumatic service
• 1/4-18 thread size with MPT thread standard for direct port connection
• Meets ISO 6149 and SAE J1926 standards
• Operating range of -30 degrees F to 275 degrees F

Compatibility

Designed as an OEM-style compression tube connector for use in fluid, pneumatic, and instrumentation systems requiring a Compression x MNPT straight inline fitting with a 1/4-18 MPT thread size.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or pipefitter. De-pressurize and isolate the system completely before disconnecting or installing any fitting. Ensure tubing is cut squarely and deburred before inserting into the compression end to achieve a proper seal. Hand-tighten first, then use a wrench to complete the connection — do not overtighten, as brass fittings can crack or distort under excessive torque.