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.