Cerrobrass 66A-6A Compression Tube Connector 3/8 Od 1/8 Npt

Product Description

The CERROBRASS 66A-6A is a brass compression tube connector designed to join 3/8-inch OD tubing to a 1/8-inch NPT female threaded port. The fitting uses a Compression x FNPT end connection configuration with a 9/16-24 thread size on the compression side. Constructed from brass, it handles working pressures up to 400 psi and operates across a temperature range of -65 degrees F to 212 degrees F. This type of fitting is a standard component in fluid and gas line assemblies where a reliable, leak-resistant mechanical joint is required without soldering or welding. Licensed plumbers, HVAC technicians, and pipefitters are the typical installers.

The 66A-6A connector is suited for residential and light commercial applications where 3/8-inch OD tubing must terminate at a female NPT threaded port. Common installations include instrument tubing, refrigeration line sets, pneumatic systems, and fuel or gas distribution lines. The SAE standard rating confirms the fitting meets recognized industry dimensional and performance requirements for this connection type.

Key Features

• Compression x FNPT end connections for tool-assisted, solder-free assembly
• 3/8-inch tube outside diameter compatibility
• 1/8-inch NPT pipe size on the female threaded end
• 400 psi maximum working pressure
• Brass construction for corrosion resistance in fluid and gas service
• SAE rated for verified dimensional and performance compliance

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems using 3/8-inch OD tubing with 1/8-inch NPT female threaded ports in compression fitting applications.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or pipefitter. Shut off and depressurize the line completely before disassembling or installing any compression fitting. Ensure the tubing end is cut cleanly and squarely and is free of burrs before inserting into the compression fitting body. Follow applicable codes such as the IPC or IFGC for pipe and tubing connection requirements in the relevant system type.