Parker 66PTC-4-4 Push-to-connect Female Connector 1/4 in

Product Description

The PARKER 66PTC-4-4 is a brass push-to-connect female connector fitting designed for tube-to-female NPT tube connections in pneumatic and air brake systems. It accepts 1/4 inch OD tubing on each tube port and threads into a 1/4 inch FNPT port. Rated to 250 psi maximum working pressure, it is built to perform across a wide temperature range of -40 degrees F to 200 degrees F. The nitrile O-ring provides a reliable seal under pressure. This fitting is a DOT-designated air brake fitting, making it appropriate for use in commercial vehicle air brake circuits. Installation is typically performed by qualified mechanics or fluid power technicians.

This fitting is suited for DOT-compliant air brake plumbing on commercial vehicles and pneumatic control systems where a push-to-connect interface is required at an FNPT port. The tube-in, tube-in, female-center configuration allows inline connection between tubing runs and a threaded port. It is commonly used in fleet maintenance, vehicle manufacturing, and industrial pneumatic assemblies where fast, secure tube connections are needed without additional ferrules or compression sleeves.

Key Features

• Push-to-connect on both tube ports for tool-free tube insertion
• 1/4 inch OD tube connection with 1/4 inch FNPT center thread
• 250 psi maximum working pressure rating
• Brass construction for corrosion resistance in air and fluid service
• Nitrile O-ring seal for reliable performance across temperature range
• DOT FMVSS571.106 compliant — approved for air brake applications
• Meets SAE J2494 and SAE J2494-3 standards

Compatibility

Designed as a DOT-compliant push-to-connect air brake fitting for use with 1/4 inch OD nylon or polyethylene air brake tubing in commercial vehicle and industrial pneumatic systems. Compatible with NPTF-threaded ports.

Installation Notes

This fitting should be installed by a qualified technician familiar with DOT air brake regulations and pneumatic plumbing practices. Depressurize the air system completely before removing or installing any fittings. Ensure tubing is cut squarely and free of burrs before inserting into the push-to-connect port. Thread engagement into NPTF ports should follow standard practices per applicable SAE and DOT guidelines — avoid overtightening brass fittings to prevent thread damage.