Parker 63PT-3-40 Compression Tube Insert 3/16 Inch Brass

Product Description

The PARKER 63PT-3-40 is a brass compression tube insert designed to reinforce and support soft tubing in compression fitting assemblies. This insert fits inside the tubing end to prevent collapse when the compression nut and ferrule are tightened, maintaining a reliable seal under pressure. Constructed from brass for corrosion resistance and durability, the 63PT-3-40 measures 0.52 inches in overall length and is sized for 3/16-inch outside diameter tubing. It is a small but critical component in fluid and pneumatic line installations where tube integrity at the fitting connection point is essential.

This tube insert is used in residential and light commercial applications involving soft copper, aluminum, nylon, or plastic tubing runs. Common installation scenarios include refrigeration lines, pneumatic control circuits, fuel lines, and instrumentation tubing. HVAC technicians, plumbers, and fluid-systems mechanics use this insert wherever a compression fitting joins a soft or thin-walled tube that requires internal support to maintain roundness and prevent fitting leakage under service conditions.

Key Features

• Brass construction provides corrosion resistance and long service life in fluid and pneumatic systems
• Sized for 3/16-inch outside diameter tubing for precise fitment
• 0.52-inch overall length supports the tubing end through the full ferrule engagement zone
• Rated for service from -65 degrees F to 250 degrees F, covering a wide range of operating environments
• Prevents tube collapse during compression fitting torque, ensuring leak-free connections

Compatibility

Designed as an OEM-style support insert for compression fittings used with 3/16-inch outside diameter soft or thin-walled tubing in fluid, pneumatic, and refrigeration line assemblies.

Installation Notes

Licensed HVAC technicians, plumbers, or qualified mechanics should install this insert as part of a compression fitting assembly. Before beginning work, shut off and depressurize any fluid or pneumatic line being serviced. Slide the insert fully into the tubing end before assembling the compression nut and ferrule onto the fitting body. Do not reuse compression ferrules, as deformed ferrules can mask an improperly seated insert and result in leaks.