Parker 172PTC-8-4 Push-to-connect Tube Male Npt Fitting

Product Description

The PARKER 172PTC-8-4 is a push-to-connect tube-to-male NPT fitting designed for tube-to-tube and tube-to-threaded-port connections in pneumatic and air brake systems. Made from brass, it accepts a 1/2 inch OD tube on both tube ends and terminates with a 1/4 inch NPT male thread. Rated to 250 psi maximum working pressure, this fitting is classified as a D.O.T. air brake fitting, making it suitable for regulated air brake circuit work. The nitrile O-ring seal provides reliable tube retention and a leak-resistant connection across a wide service temperature range. Licensed HVAC technicians, fleet mechanics, and plumbing professionals install this fitting in compressed air and brake line assemblies.

This fitting is intended for use in D.O.T.-regulated air brake systems as well as general compressed air plumbing applications. The push-to-connect design allows for fast field assembly without additional ferrules or compression sleeves. It is suited for both light commercial and heavy-duty vehicle air brake circuits, as well as pneumatic control lines in HVAC and industrial equipment where 1/2 inch OD tubing with a 1/4 inch NPT port interface is required.

Key Features

• Push-to-connect design for tool-free tube insertion and secure retention
• 1/2 inch OD tube connection on both tube ports
• 1/4 inch NPT male thread for direct port mounting
• Rated to 250 psi maximum working pressure
• D.O.T. air brake fitting classification for regulated brake circuit use
• Nitrile O-ring seal for reliable, leak-resistant performance
• Brass construction for corrosion resistance in air and pneumatic service

Compatibility

Designed as a D.O.T.-rated replacement or service fitting for air brake and compressed air systems using 1/2 inch OD tubing with 1/4 inch NPT threaded ports. Confirm thread type and tube OD against existing system specifications before installation.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with D.O.T. air brake regulations and pneumatic system requirements. Depressurize and drain the air system completely before removing or installing any fitting. Verify that the tube OD and NPT thread size match the system connections before assembly. Apply appropriate thread sealant to the male NPT threads in accordance with system requirements and applicable codes.