Parker A6ST9-MG Push-to-connect Straight Connector 3/8 in

Product Description

The PARKER A6ST9-MG is a push-to-connect straight tube fitting connector designed for fast, tool-free tube connections in pneumatic and fluid-handling systems. Built from polyoxymethylene (POM), a rigid engineering-grade thermoplastic, this fitting accepts 3/8 inch OD tubing and threads into a 9/16-18 UNF-2A port. Rated to 300 psi, it is suited for compressed air lines, low-pressure fluid circuits, and similar plumbing or pneumatic distribution runs where a reliable inline connection is required. HVAC technicians, plumbers, and industrial maintenance professionals use this type of fitting when running control-air or process-fluid lines.

This fitting is appropriate for residential and light commercial applications where 3/8 inch OD tubing terminates at a threaded port. Common install scenarios include pneumatic control panels, air-operated equipment, and process-fluid manifolds. The straight connector configuration allows a direct inline run without angular offset, keeping routing straightforward in tight panel or equipment enclosures. Its tan POM construction resists many common chemicals and oils encountered in HVAC and plumbing service environments.

Key Features

• Push-to-connect design allows tool-free tube insertion and secure retention without ferrules or compression sleeves
• POM (polyoxymethylene) body provides rigidity, dimensional stability, and chemical resistance
• Rated to 300 psi for reliable performance in pneumatic and low-pressure fluid circuits
• 3/8 inch OD tubing port with 9/16-18 UNF-2A male thread for positive port engagement
• Straight connector geometry supports direct inline tube routing
• Compact and lightweight at 0.02 pounds, suitable for space-constrained installations

Compatibility

Designed as an OEM-style push-to-connect straight connector for pneumatic and fluid-handling systems using 3/8 inch OD tubing with a 9/16-18 UNF-2A threaded port.

Installation Notes

Installation is performed by inserting the tubing straight into the fitting collet until fully seated — ensure the tube end is cut square and free of burrs before insertion. Depressurize and de-energize the system before disconnecting or replacing any fitting in a live pneumatic or fluid line. Thread engagement should be confirmed snug against the port face; do not overtighten POM-body fittings as the thermoplastic threads can be damaged. Follow applicable plumbing or pneumatic system codes and the equipment manufacturer's service procedures.