Parker 172PTCNS-3-2 Push-to-connect Tube Fitting Npt

Product Description

The PARKER 172PTCNS-3-2 is a push-to-connect tube fitting designed for inline tube-to-tube connections with a male NPT branch port. Constructed from brass with a nitrile O-ring seal, it handles working pressures up to 250 psi and operates across a temperature range of -40 degrees F to 200 degrees F. The push-to-connect design allows fast, tool-free tube insertion on both tube ends while the 1/8 inch NPT male thread provides a secure threaded connection at the branch. This fitting carries a D.O.T. Air Brake Fitting designation, making it suitable for air brake system plumbing on commercial vehicles and related pneumatic applications. Licensed technicians and fleet service professionals are the primary installers.

This fitting is used in pneumatic and fluid transfer systems where a quick-connect tube junction with a threaded port is required. Its D.O.T. Air Brake designation makes it a go-to choice for air brake line repairs and builds on commercial trucks, trailers, and buses. The 3/16 inch OD tube size and 1/8 inch NPT thread are common sizes in brake and low-pressure pneumatic circuits. It is also applicable in light industrial and OEM pneumatic assemblies where brass construction and nitrile seals are appropriate for the media and temperature range involved.

Key Features

• Push-to-connect on both tube ends for fast, tool-free installation with 3/16 inch OD tubing
• 1/8 inch male NPT threaded port for secure inline branch connection
• Brass body construction for corrosion resistance in pneumatic and compatible fluid service
• Nitrile O-ring seals rated for -40 degrees F to 200 degrees F service
• 250 psi maximum working pressure
• D.O.T. Air Brake Fitting designation for air brake system compliance

Compatibility

Designed for use with 3/16 inch OD tubing and 1/8 inch NPT threaded ports in D.O.T.-rated air brake systems and general pneumatic assemblies where brass push-to-connect fittings with nitrile seals are specified.

Installation Notes

Installation should be performed by a qualified technician familiar with D.O.T. air brake regulations and pneumatic system service. Depressurize the system completely before removing or installing any fitting. Ensure tubing is cut squarely and deburred before insertion into the push-to-connect ports to achieve a proper seal. Thread engagement on the NPT port should follow standard practice using an appropriate thread sealant compatible with the system media.