Parker 66CA-3-2 Compression Tube Connector 1/8-27 Fnpt

Product Description

The PARKER 66CA-3-2 is a brass compression tube connector designed to create a leak-tight joint between a compression tube end and a female NPT port. It bridges compression-style tubing to FNPT-threaded fittings in fluid and pneumatic systems where reliable sealing under pressure is critical. Rated to 1900 psi maximum working pressure, the fitting handles temperatures from -65 degrees F to 250 degrees F, making it suitable for a broad range of system conditions. The 1/8-27 NPTF thread standard ensures a pressure-tight mechanical seal. Licensed plumbers, HVAC technicians, and industrial pipefitters install this type of connector in refrigeration, instrumentation, and compressed-air applications.

This connector is used in residential and light commercial HVAC systems, refrigeration equipment, pneumatic control lines, and hydraulic instrumentation circuits where a compression tube must transition to a female NPT port. It is suited for installations requiring a compact, brass-body fitting in tight spaces or panel-mounted assemblies. The NPTF thread form provides a dry-seal connection, reducing reliance on thread sealant in many applications.

Key Features

• Brass construction for corrosion resistance in fluid and pneumatic service
• Compression x FNPT end connections for tube-to-pipe transitions
• 1/8-27 NPTF thread standard provides a pressure-tight dry-seal fit
• 1900 psi maximum working pressure rating
• Wide temperature range: -65 degrees F to 250 degrees F

Compatibility

Designed as an OEM-style replacement compression connector for fluid, pneumatic, and refrigeration line assemblies requiring a compression-to-FNPT transition fitting in brass.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or HVAC technician. Shut off and depressurize the system fully before removing or installing any compression fitting. Hand-tighten the compression nut onto the tube, then use a wrench to snug the fitting without over-torquing the brass body. NPTF threads are designed for dry-seal engagement, but consult applicable codes such as IPC or IFGC for guidance on sealant requirements in your jurisdiction.

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.