Hy-Lok FittingsHome Hy-Lok Fittings Share FacebookTwitterLinkedInGoogle+Email August 25, 2016 by amtiadminHy-lok tube and pipe fittings provide leak-free connections for instrumentation, pneumatics, hydraulics, fluid delivery systems and other related industries.Learn more about Hy-lok fittings: Double Ferrule Compression Tube Fittings Instrument Pipe Fittings Hose Connectors 37° Flare JIC Tube Fittings DIN 2353 Tube Fittings