Parker 66C-5-2 Compression Tube Connector 1/8-27 Fnpt

Product Description

The PARKER 66C-5-2 is a brass compression tube connector designed to join compression tubing to female NPT threaded ports in fluid and pneumatic systems. It features a compression inlet on one end and a 1/8-27 FNPT threaded connection on the other, providing a reliable, leak-resistant joint without the need for solder or special tooling. Manufactured from brass to resist corrosion, the fitting is rated for working pressures up to 300 psi and a temperature range of -65 degrees F to 250 degrees F. It meets SAE J-512 standards and is sized at 1.07 inches overall length. Plumbers, HVAC technicians, and industrial piping contractors install this fitting in low-pressure fluid and gas line assemblies.

This fitting is suited for residential and light commercial applications where compression tubing must terminate at a female NPT port. Typical installations include refrigeration lines, pneumatic control circuits, instrument air lines, and plumbing distribution systems. The 1/8-27 thread size is common in control and sensing connections, making this connector a standard choice when transitioning from compression tube to NPT-threaded equipment, valves, or gauges.

Key Features

• Compression x FNPT end connections allow tubing to thread directly into NPT-ported equipment
• Brass construction provides corrosion resistance in fluid and low-pressure gas service
• Rated to 300 psi maximum working pressure
• Operating temperature range of -65 degrees F to 250 degrees F
• Meets SAE J-512 standard for compression fittings
• Compact 1.07-inch overall length for tight installation spaces

Compatibility

Designed as an OEM-style compression tube connector for systems using 1/8-27 FNPT threaded ports and compatible compression tubing per SAE J-512.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified piping mechanic. Shut off and depressurize the line before disassembly or fitting installation. Hand-tighten the compression nut first, then advance with a wrench per standard compression fitting practice — do not overtighten, as brass fittings are susceptible to thread damage. Verify all connections are leak-free under pressure before returning the system to service.

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.