Unilok tube fittings are designed and manufactured to provide a reliable, leak-proof connection in instrumentaion and process tubing systems. The single ferrule design, with the spring-like action of the ferrule during make-up, compensates for variatoins in tubing materials, hardness and thickness of the tube wall to provide leak-tight connections. Click on the catalog below to download the full version. Unilok tube fittings are designed to provide leak-tight intermix and interchange with Parker CPI™ tube fittings