Parker 68C-6-4 Compression Tube Connector 3/8 Od Brass

Product Description

The PARKER 68C-6-4 is a brass compression tube connector designed to join 3/8-inch OD tubing to a 1/4-18 NPTF male threaded port. It features a compression end on one side and a male NPT (MNPT) end on the other, making it a reliable solution for converting or terminating tube runs at threaded fittings. Rated to 200 psi maximum working pressure and a temperature range of -65 to 250 degrees F, this connector handles the demands of refrigeration, pneumatic, and fluid-handling systems. The brass construction resists corrosion and meets SAE J-512 standards. Licensed HVAC and plumbing technicians are the primary installers of this fitting.

The 68C-6-4 is suited for residential and light commercial HVAC systems, pneumatic control lines, fuel systems, and general fluid distribution applications where a compression tube must terminate or transition at a male NPT port. The compression-style connection allows for a secure, leak-resistant joint without soldering or flaring. This fitting is commonly used in control tubing, instrument lines, and low-pressure fluid circuits where SAE J-512 compliance is required.

Key Features

• Compression x MNPT end connections for tool-accessible, no-solder installation
• 3/8-inch tube OD compression end with 1/4-18 NPTF male thread
• 200 psi maximum working pressure
• Operating temperature range: -65 to 250 degrees F
• Brass construction for corrosion resistance and durability
• Meets SAE J-512 standard

Compatibility

Designed as an OEM-style compression fitting for use in systems requiring a 3/8-inch OD tube connection to a 1/4-18 NPTF male port, consistent with SAE J-512 applications in HVAC, pneumatic, and fluid-handling installations.

Installation Notes

This fitting is typically installed by licensed HVAC technicians, plumbers, or pipefitters. Shut off system pressure and depressurize the line completely before removing or installing any compression fitting. Hand-tighten the compression nut onto the tube, then advance with a wrench to achieve a proper bite on the ferrule — do not overtighten. Verify the connection for leaks before returning the system to service, in accordance with applicable codes such as the IPC or IFGC.