Parker 68CA-4-6 Compression Tube Connector 3/8-18

Product Description

The PARKER 68CA-4-6 is a brass compression tube connector designed to join tubing to a male pipe thread port in fluid and pneumatic systems. It features a 3/8-18 NPTF thread on the male pipe end and a compression-style connection on the tube end, allowing a secure, leak-resistant seal without welding or flaring. Rated to 1400 psi maximum working pressure and suitable for temperatures ranging from -65 degrees F to 250 degrees F, this fitting handles demanding service conditions. It is installed by licensed plumbers, HVAC technicians, and industrial pipefitters working on compressed air, hydraulic, or process fluid lines.

This connector is suited for residential and light commercial applications where tubing must terminate into a threaded port on valves, manifolds, pumps, or equipment panels. The compression-to-MNPT configuration is common in HVAC refrigerant-adjacent plumbing, compressed air distribution, fuel lines, and instrumentation tubing runs. Its all-brass construction resists corrosion and is compatible with a wide range of media including water, oil, and many industrial gases.

Key Features

• Brass construction provides corrosion resistance and durability across a wide range of media
• Compression x MNPT end connections for tool-friendly, no-flare installation
• 3/8-18 NPTF thread standard ensures pressure-tight engagement with matching female ports
• 1400 psi maximum working pressure rating suits high-demand fluid and pneumatic circuits
• Wide temperature range of -65 degrees F to 250 degrees F supports diverse service environments

Compatibility

Designed as an OEM-style replacement or new-installation compression connector for systems requiring a 3/8-18 NPTF male pipe thread port with a compression tube inlet.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or pipefitters. Depressurize and isolate the line completely before disassembly or fitting installation. Hand-tighten the compression nut onto the tube, then advance with a wrench to achieve a proper compression seal without over-tightening, which can deform the ferrule. Follow applicable IPC and IFGC code requirements for the specific media and service environment.