Series 500 Tube Quick-Connect Coupler

360-Degree Integration

Every unique problem calls for a unique solution. Please contact PCU today to see how we can create a custom designed solution specifically for your manufacturing facility.

These tough, compact, lightweight couplers utilize heat-treated parts for interchangeability and long life. Oxide and nickel finishes are corrosion resistant. They provide a large, unrestricted flow rate for a variety of production uses while minimizing material loss during coupling and uncoupling. Temperature range: 0-250° F (0-121° C).

For valve couplers, the coupler is pictured with our Series 250 nipple as an integral assembly.

Series 500 is designed for easy installation with an instant positive connection to straight tubing. Slide the coupler onto the tubing until seated and push down on the mechanical lock lever to make a positive seal. A cam-locking device grips uniformly and firmly without damage to steel, copper, brass, or plastic tubing. The tube seal will accept tubing out of roundness conditions up to 2%. Extended seal life reduces connector maintenance costs.

STRONG: Holds pressures from 25 microns up to 500 psig.

SAFE: Built-in safety valve automatically vents system pressure before the connector can be removed from the tube. Blow-off or seal loss by accidental bumping is eliminated.

FLEXIBLE: Easily repairable with internal parts that are interchangeable allowing the same connector body to fit all four tube sizes. When using vacuum and ester oils, please contact our Order Department (937-299-5594) for help with selecting the correct elastomer for the particular application.

Tube Sizes

  • 3/16”
  • 1/4”
  • 5/16”
  • 3/8”


  • Vacuum/Air
  • Refrigerants
  • Water
  • Oil
  • Mass Spectrometer
  • Helium
  • Nitrogen


  • Leak-Free, Positive Locking
  • Quick Connect/Disconnect
  • Valve Shutoff
  • Long Lasting
  • Economical
  • 13/16" Straight Tube Engagement
  • Repairable
  • Fewer Parts than Series 50 ~ Less cost

PCU, Inc. can customize tube sizes, seal compounds, or end caps to meet specific application requirements. Metric sizes are available