Parker 66CA-5-4 Compression Tube Connector Brass Fnpt

Product Description

The PARKER 66CA-5-4 is a brass compression tube connector designed to join tubing to female NPT threaded ports in fluid and pneumatic systems. It features a compression inlet on one end and a 1/4-18 NPTF female thread on the other, creating a reliable, leak-resistant connection without soldering or flaring. Rated to 1200 psi maximum working pressure, this connector handles demanding system pressures found in hydraulic, refrigeration, and instrumentation lines. The brass construction resists corrosion and holds up across a wide temperature range from -65 degrees F to 250 degrees F. Licensed plumbers, HVAC technicians, and instrumentation installers commonly specify this fitting in both new construction and retrofit work.

This connector suits residential and light commercial applications where tubing must transition to a female NPT threaded port. Typical uses include refrigerant line connections, compressed air systems, fuel lines, and instrumentation tubing runs. The compression-to-FNPT configuration makes it a practical choice when working with copper or compatible soft tubing that needs to tie into a manifold, valve body, or equipment port with a standard NPT female thread. Its compact form factor fits into tight equipment cabinets and mechanical rooms without requiring special tooling or adapters.

Key Features

• 1/4-18 NPTF thread standard for reliable, pressure-tight sealing without additional sealant tape in many applications
• Compression x FNPT end connections allow quick, tool-assisted assembly without soldering or flaring
• 1200 psi maximum working pressure suits hydraulic, pneumatic, and refrigeration system demands
• Wide temperature range from -65 degrees F to 250 degrees F covers most trade service conditions
• Brass construction provides corrosion resistance and durability in wet or chemical-exposed environments

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems requiring a compression tube to female NPT threaded port connection with a 1/4-18 NPTF thread specification.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified instrumentation mechanic. Depressurize and isolate the system completely before removing or installing any compression fitting. Ensure tubing is cut cleanly and squarely and that the compression sleeve seats properly before tightening the compression nut to avoid leaks. Follow applicable codes, including IPC or IFGC requirements, for the system type being serviced.