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.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.