Parker 68C-6-6 Compression Tube Connector Brass 3/8-18

Product Description

The PARKER 68C-6-6 is a brass compression tube connector designed to create a leak-tight transition between a compression tube end and a male NPT threaded port. Built to SAE J-512 standards, this fitting handles working pressures up to 200 psi and performs across a temperature range of -65 degrees F to 250 degrees F. The body is machined from brass for corrosion resistance and reliable seating on both the compression and threaded ends. Licensed plumbers, HVAC technicians, and fluid system mechanics install this type of fitting in pneumatic, hydraulic, and refrigeration line assemblies where a secure tube-to-pipe transition is required.

This connector is suited for residential and light commercial applications involving tubing runs that terminate at NPT-ported equipment or manifolds. The 3/8-18 NPTF thread engages standard male NPT ports, while the compression end accepts 3/8-inch outside diameter tubing. Typical use cases include instrument lines, fuel lines, refrigerant-adjacent fluid circuits, and control system tubing where a reusable, wrench-assembled connection is preferred over flare or solder joints.

Key Features

• SAE J-512 compliant construction for consistent dimensional and performance standards
• Brass material provides corrosion resistance suitable for a wide range of fluids
• Compression x MNPT end configuration enables direct tube-to-pipe transitions without adapters
• Rated to 200 psi maximum working pressure
• Wide service temperature range: -65 degrees F to 250 degrees F
• 3/8-18 NPTF thread standard for positive thread engagement

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems using 3/8-inch OD tubing with a male NPT threaded port connection conforming to SAE J-512 standards.

Installation Notes

Installation should be performed by a qualified plumber, HVAC technician, or pipefitter familiar with compression fitting assembly procedures. Depressurize and drain the system completely before disassembling or installing any fittings. Ensure the tube end is cut square, deburred, and free of scoring before inserting into the compression end. NPTF threads are designed for metal-to-metal sealing, but consult applicable codes such as the IPC or IFGC when determining thread sealant requirements for the specific fluid service.