Parker VS368PTCR-6-4 Push-to-connect Union Fitting

Product Description

The PARKER VS368PTCR-6-4 is a push-to-connect union tube fitting designed for fast, tool-free connections in pneumatic and fluid line applications. Constructed from brass with Buna-N O-rings and a nylon body component, this fitting handles up to 250 psi and operates across a wide temperature range starting at -40 degrees F. The connection type is push-to-connect on two ports with a male NPTF thread on the third port, making it a reducing union that transitions between 3/8 inch OD tubing on two sides and a 1/4 inch OD male NPTF connection. It is typically installed by HVAC technicians, plumbers, or pneumatic system mechanics working with compressed air or general-purpose fluid lines.

This fitting is rated for general-purpose use and meets D.O.T. FMVSS571.106, SAE J2494, SAE J2494-3, and SAE J844 standards, making it suitable for a broad range of commercial and industrial pneumatic and fluid distribution systems. The 3/4 inch hex size allows for secure wrench engagement on the threaded port during installation. Overall length is 2.56 inches (65.02 mm). Its compact profile suits installations where space is limited and a reliable push-to-connect union is needed to join or transition tubing runs.

Key Features

• Push-to-connect design allows fast, tool-free tube insertion on both 3/8 inch OD ports
• Brass body construction provides corrosion resistance for fluid and air service
• Nitrile (Buna-N) O-ring seals rated from -40 degrees F for reliable performance in cold environments
• Rated to 250 psi working pressure
• Meets D.O.T. FMVSS571.106, SAE J2494, SAE J2494-3, and SAE J844 standards
• NPTF male thread on the 1/4 inch port ensures a dry-seal, leak-resistant connection

Compatibility

Designed for general-purpose pneumatic and fluid line applications using 3/8 inch OD tubing on push-to-connect ports and a 1/4 inch male NPTF threaded connection. Verify tube OD and thread specification against your system requirements before installation.

Installation Notes

Depressurize and isolate the fluid or air line completely before removing any existing fittings or inserting this union. Ensure tube ends are cut square and free of burrs before inserting into the push-to-connect ports — damaged or out-of-round tube ends can compromise the seal. Apply appropriate thread sealant to the NPTF male port per system requirements. Follow applicable SAE and D.O.T. guidelines for the specific system being serviced.