Union, Connector, Cross, High Pressure, 1.0 mm Through Hole with 10-32 Screw Threads. PEEK, Round with an Internal X. Use with 1/16 inches Tubing. ARE-Applied Research brand. 2/PK.
This "Union" is used to connect the same size PEEK or Stainless Steel tubing on all ends, in the high pressures zones of HPLC systems. A "Cross Connection" is often used to split flow into two or three directions or to combine two or three streams into one.