Parker A5RD6-MG Push-to-connect Plug-in Reducer 5/16 in

Product Description

The PARKER A5RD6-MG is a push-to-connect plug-in reducer tube fitting designed for quick, tool-free connections in pneumatic and fluid transfer lines. Machined from polyoxymethylene (POM), a high-strength acetal resin, this fitting accepts a 5/16 inch outside diameter tube and reduces to a smaller port in a single step. It is rated to 300 psi, making it suitable for compressed air and compatible low-pressure fluid applications. HVAC technicians, plumbers, and industrial service pros use this style of fitting when a fast, secure tube termination or size transition is needed without threading or soldering.

This fitting is suited for residential and light commercial pneumatic systems, condensate management lines, and instrumentation tubing runs. The plug-in reducer design allows a technician to insert the tube with one hand and achieve an immediate pressure-holding seal. Its compact form and tan POM construction make it a common choice in tight panel or equipment enclosure installations where metal fittings would add unnecessary weight or risk corrosion.

Key Features

• Push-to-connect design allows tool-free tube insertion for fast field installation
• Rated to 300 psi for use in compressed air and low-pressure fluid lines
• Polyoxymethylene (POM) body resists moisture, mild chemicals, and corrosion
• Plug-in reducer configuration transitions tube OD in a single fitting body
• Lightweight at 0.02 pounds — suitable for compact panel and enclosure installs
• 5/16 inch OD tube connection with tan color-coding for quick identification

Compatibility

Designed as an OEM-style push-to-connect replacement reducer fitting for pneumatic and low-pressure fluid tubing systems using 5/16 inch outside diameter tubing.

Installation Notes

Installation is performed by licensed HVAC technicians, plumbers, or instrumentation technicians depending on the system. Depressurize and isolate the line fully before removing any existing fitting. Ensure the tube end is cut cleanly and squarely with a tube cutter — ragged cuts will compromise the collet seal. To release the tube, depress the collet ring evenly while pulling the tube straight out; never force or twist the tube under pressure.