Parker 171PTCNS-8-4 Push-to-connect Tube Male Npt Fitting

Product Description

The PARKER 171PTCNS-8-4 is a brass push-to-connect tube-to-male NPT fitting designed for use in pneumatic and fluid transfer systems requiring a reliable, leak-free connection. This fitting accepts 1/2 inch OD tubing on both tube ends and threads into a 1/4 inch NPT male port, providing an inline union between tubing runs and threaded components. It is rated to 250 psi maximum working pressure and carries a D.O.T. Air Brake designation, making it appropriate for air brake system service on commercial vehicles and heavy equipment. The nitrile O-ring construction supports a service temperature range of -40 degrees F to 200 degrees F. Installation does not require ferrules, compression sleeves, or specialized tooling.

This fitting is suited for air brake lines, pneumatic control circuits, and pressurized fluid transfer applications in both commercial vehicle and industrial settings. The D.O.T. Air Brake rating qualifies it for regulated air brake plumbing where compliant fittings are required by law. The push-to-connect design speeds up assembly in tight spaces, making it a common choice for fleet mechanics, pneumatic system technicians, and plumbing professionals working with compressed air distribution or fluid control lines.

Key Features

• D.O.T. Air Brake rated for use in regulated commercial vehicle air brake systems
• Push-to-connect design on both tube ports — no ferrules or compression sleeves required
• 1/4 inch NPT male thread for direct connection to threaded ports and manifolds
• Brass body construction for corrosion resistance and durability in pressurized service
• Nitrile O-ring seals rated from -40 degrees F to 200 degrees F
• 250 psi maximum working pressure

Compatibility

Designed for use with 1/2 inch OD tubing in pneumatic and air brake plumbing systems requiring a push-to-connect tube-to-male NPT inline fitting. D.O.T. Air Brake designation applies to qualifying air brake circuit applications per applicable federal motor vehicle safety standards.

Installation Notes

Installation is typically performed by fleet mechanics, pneumatic system technicians, or licensed plumbers working on compressed air systems. Depressurize and isolate the circuit fully before removing or installing any fitting. Ensure the 1/4 inch NPT male threads are clean and apply thread sealant appropriate for the service medium before torquing to the port. Tubing must be cut cleanly and squarely to the correct OD before inserting into the push-to-connect ports to achieve a proper seal.