Parker 66AB-8-6 Compression Tube Connector 3/8-18 Nptf Brass

Product Description

The PARKER 66AB-8-6 is a brass compression tube connector designed to join compressed tubing to female NPT threaded ports in fluid and pneumatic line systems. It features a 3/8-18 NPTF thread and a compression x FNPT end connection configuration. Rated to 400 psi maximum working pressure, the connector handles operating temperatures from -65 degrees F to 250 degrees F. Constructed from brass, it provides reliable corrosion resistance for use in hydraulic, pneumatic, and fluid transfer applications. Licensed plumbers, HVAC technicians, and fluid system mechanics install this fitting in both residential and commercial service environments.

This connector is suited for applications requiring a secure, leak-resistant transition from compression tubing to a female NPT port. It meets D.O.T. FMVSS571.106 and SAE J246 standards, making it appropriate for use in regulated fluid and brake line systems where compliance is required. The 0.408-inch inside diameter accommodates standard tubing sizes compatible with the 3/8-18 thread specification. Typical install scenarios include compressed air systems, fuel lines, and hydraulic control circuits in both mobile and stationary equipment.

Key Features

• Brass construction for corrosion resistance in fluid and pneumatic systems
• Compression x FNPT end connections for reliable tube-to-port transition
• Rated to 400 psi maximum working pressure
• Wide temperature range: -65 degrees F to 250 degrees F
• Meets D.O.T. FMVSS571.106 and SAE J246 standards
• 3/8-18 NPTF thread standard for secure, pressure-rated engagement

Compatibility

Designed as an OEM-style replacement or new-installation compression connector for fluid and pneumatic line systems requiring a 3/8-18 NPTF compression x FNPT fitting configuration.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified fluid systems mechanic. Always depressurize and isolate the line before removing or installing any compression fitting. Apply thread sealant appropriate for the service medium on NPTF threads and ensure the compression sleeve and nut are properly seated before pressurizing. Verify that the connected tubing meets the pressure and temperature ratings of this fitting before returning the system to service.