Duolok tube fittings are designed and manufactured to provide a reliable, leak-proof connection in instrumentation and process tubing systems. Duolok tube fittings use a two-ferrule design, which, with the staged sequential swaging action of the ferrules during make-up, compensates for the variations in tubing materials, hardness, and thickness of the tube wall to provide leak-tight connections. Duolok tube fittings are designed to provide leak-tight intermix and interchange with Swagelok® and Parker A-Lok™ tube fittings. Click on the catalog below to download the full version.