Parker 66VL-4-2 Compression Tube Connector 1/8-27 Fnpt Brass

Product Description

The PARKER 66VL-4-2 is a brass compression tube connector designed to join tubing to female NPT-threaded ports in fluid and pneumatic systems. It features a Compression x FNPT end connection with a 1/8-27 thread size and uses Parker's Vibra-Lok compression style, which provides a secure, vibration-resistant seal without the need for flaring or soldering. Rated to 600 psi maximum working pressure, this connector is suited for installations where reliability under pressure and temperature cycling is required. Brass construction offers corrosion resistance in a wide range of media. Licensed HVAC technicians, plumbers, and instrumentation technicians commonly specify this fitting for control-line and instrument-tubing connections.

The 66VL-4-2 is used in residential and commercial HVAC, refrigeration, and fluid power applications where a tubing line must terminate at an FNPT port on a valve, manifold, or equipment housing. The Vibra-Lok compression design makes it well suited for installations subject to vibration, such as near compressors or pumps. Compliance with ISO 6149 and SAE J1926 standards makes this fitting acceptable in systems requiring verified dimensional and pressure standards.

Key Features

• Vibra-Lok compression style provides vibration-resistant, no-flare connection
• Brass construction for corrosion resistance across common fluid and gas media
• 600 psi maximum working pressure for demanding system requirements
• 1/8-27 FNPT thread for direct connection to standard female NPT ports
• Meets ISO 6149 and SAE J1926 dimensional and pressure standards
• Operating temperature range from -30 degrees F to 275 degrees F

Compatibility

Designed as an OEM-style compression fitting for use in fluid, pneumatic, and HVAC tubing systems that require a Compression x FNPT connection at a 1/8-27 threaded port.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or instrumentation mechanic familiar with compression fittings and applicable codes. Shut off and depressurize the system completely before removing or installing any fitting. Do not overtighten the compression nut, as brass fittings are susceptible to thread and ferrule damage from excess torque. Verify tubing is cut square and fully seated before tightening to ensure a leak-free Vibra-Lok seal.