Parker 171PTC-4-6 Push-to-connect Tube Male Npt Fitting

Product Description

The PARKER 171PTC-4-6 is a push-to-connect tube fitting with a male NPT end, designed for tube-to-tube and tube-to-male threaded connections in pneumatic and fluid systems. Built from brass, it accepts 1/4 inch outside diameter tubing and uses a 3/8 inch NPTF thread. The fitting is rated for a maximum working pressure of 250 psi and handles temperatures from -40 degrees F to 200 degrees F. It carries a D.O.T. Air Brake Fitting designation, making it suitable for regulated air brake circuit work. An integrated nitrile O-ring provides a reliable seal in both push-to-connect tube ports.

This fitting is used in air brake systems, pneumatic control lines, and compressed air plumbing where a quick, tool-free tube connection to a male NPT port is required. The D.O.T. designation indicates compliance for use in commercial vehicle air brake circuits. It is also appropriate for general-purpose compressed air and fluid distribution systems operating within its rated temperature and pressure envelope. Licensed mechanics, fleet service technicians, and plumbing or HVAC technicians working with pneumatic controls are the typical installers.

Key Features

• Push-to-connect design accepts 1/4 inch OD tubing without additional tools for tube insertion
• 3/8 inch NPTF male thread for leak-resistant tapered thread connections
• Brass construction for corrosion resistance in air and compatible fluid service
• Nitrile O-ring sealing at tube ports for reliable pressure retention
• D.O.T. Air Brake Fitting designation for commercial vehicle air brake circuit use
• Rated to 250 psi maximum working pressure across a -40 degrees F to 200 degrees F range

Compatibility

Designed for use in D.O.T.-compliant air brake systems and general pneumatic plumbing applications requiring a push-to-connect tube fitting with a male NPT port. Compatible with 1/4 inch OD tubing and 3/8 inch NPTF threaded ports.

Installation Notes

Installation should be performed by a qualified technician familiar with pneumatic system service and applicable D.O.T. regulations. Depressurize and isolate the air circuit completely before disconnecting or installing any fittings. Ensure the NPTF threads are clean and free of damage before make-up; use thread sealant appropriate for the service fluid if required by the application. Confirm tubing is cut squarely and fully seated in the push-to-connect port before returning the system to service.