Parker 171PTCNS-5/32-4 Push-to-connect Tube Fitting Npt

Product Description

The PARKER 171PTCNS-5/32-4 is a push-to-connect tube fitting designed for tube-to-male NPT connections in compressed air and fluid line applications. Constructed from brass, this fitting accepts 5/32 inch OD tubing on the push-to-connect ends and threads into a 1/4 inch NPT male port. It is rated for a maximum working pressure of 250 psi and carries a D.O.T. Air Brake designation, making it suitable for use in air brake systems on commercial vehicles and heavy equipment. The nitrile O-ring provides a reliable seal across a wide service temperature range. Licensed technicians and fleet maintenance professionals typically install this type of fitting in pneumatic brake and air supply lines.

This fitting is used in applications requiring a fast, tool-free tube connection to an NPT-threaded male port. Common installation scenarios include air brake systems, pneumatic control lines, and compressed air distribution in both mobile and stationary equipment. Its D.O.T. Air Brake rating qualifies it for use in regulated commercial vehicle brake circuits. The brass construction makes it well suited to dry air, mild compressed gas, and compatible fluid services within its rated pressure and temperature limits.

Key Features

• Push-to-connect design accepts 5/32 inch OD tubing without additional tools for tube insertion
• 1/4 inch NPT male thread end for direct port installation
• Rated to 250 psi maximum working pressure
• D.O.T. Air Brake Fitting designation for use in regulated air brake circuits
• Brass construction for corrosion resistance in air and compatible fluid services
• Nitrile O-ring seal rated from -40 degrees F to 200 degrees F

Compatibility

Designed as a D.O.T.-rated air brake fitting for pneumatic systems using 5/32 inch OD tubing with 1/4 inch NPT male threaded ports on commercial vehicles, heavy equipment, and compatible compressed air systems.

Installation Notes

Installation is typically performed by licensed fleet technicians, pneumatic system specialists, or qualified mechanics working on air brake circuits. Depressurize the air system completely and verify zero line pressure before removing or installing any fitting. Ensure tubing is cut cleanly and squarely and that the tube OD is free of burrs or deformation before insertion into the push-to-connect port. Air brake system repairs on commercial vehicles must comply with applicable D.O.T. and FMCSA regulations governing brake system maintenance.