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Parker CPI™/A-LOK® Instrumentation Tube Fittings are designed as leak-free connections for process, power and instrumentation applications. The CPI tube fittings utilize a single ferrule for easy make-up and excellent performance in vibration applications. The “spring loaded” effect of the single ferrule creates a constant tension between the fitting body and fitting nut. The A-LOK two ferrule compression tube fittings are designed to provide reliable leak-free connections for applications that specify a two ferrule system. These single and two ferrule fitting designs are manufactured to the highest quality standards and are available in a broad range of sizes, materials and configurations.

NOTE:
  • Dimensions for reference only, subject to change.
  • A, C1 and C2 dimensions are typical finger-tight.
    • Reducing Union for metric tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    T1 Tube O.D.

    T2 Tube O.D.

    A

    C1

    C2

    W HEX

    HBZ 3-2 N/A CPI™ to CPI™ N/A 3.0 mm N/A 2.0 mm N/A 35.8 mm N/A 15.3 mm N/A 15.3 mm N/A 12.0 mm
    HBZ 6-2 N/A CPI™ to CPI™ N/A 6.0 mm N/A 2.0 mm N/A 38.7 mm N/A 17.7 mm N/A 15.3 mm N/A 14.0 mm
    HBZ 6-3 N/A CPI™ to CPI™ N/A 6.0 mm N/A 3.0 mm N/A 38.7 mm N/A 17.7 mm N/A 15.3 mm N/A 14.0 mm
    HBZ 6-4 N/A CPI™ to CPI™ N/A 6.0 mm N/A 4.0 mm N/A 39.5 mm N/A 17.7 mm N/A 16.1 mm N/A 14.0 mm
    HBZ 8-6 N/A CPI™ to CPI™ N/A 8.0 mm N/A 6.0 mm N/A 42.4 mm N/A 18.6 mm N/A 17.7 mm N/A 15.0 mm
    HBZ 10-6 N/A CPI™ to CPI™ N/A 10.0 mm N/A 6.0 mm N/A 44.5 mm N/A 19.5 mm N/A 17.7 mm N/A 18.0 mm
    HBZ 10-8 N/A CPI™ to CPI™ N/A 10.0 mm N/A 8.0 mm N/A 44.5 mm N/A 19.5 mm N/A 18.6 mm N/A 18.0 mm
    HBZ 12-6 N/A CPI™ to CPI™ N/A 12.0 mm N/A 6.0 mm N/A 47.0 mm N/A 22.0 mm N/A 17.7 mm N/A 22.0 mm
    HBZ 12-8 N/A CPI™ to CPI™ N/A 12.0 mm N/A 8.0 mm N/A 47.8 mm N/A 22.0 mm N/A 18.6 mm N/A 22.0 mm
    HBZ 12-10 N/A CPI™ to CPI™ N/A 12.0 mm N/A 10.0 mm N/A 48.7 mm N/A 22.0 mm N/A 19.5 mm N/A 22.0 mm
    HBZ 16-10 N/A CPI™ to CPI™ N/A 16.0 mm N/A 10.0 mm N/A 49.5 mm N/A 22.0 mm N/A 19.5 mm N/A 24.0 mm
    HBZ 16-12 N/A CPI™ to CPI™ N/A 16.0 mm N/A 12.0 mm N/A 52.0 mm N/A 22.0 mm N/A 22.0 mm N/A 24.0 mm
    HBZ 18-12 N/A CPI™ to CPI™ N/A 18.0 mm N/A 12.0 mm N/A 53.5 mm N/A 22.0 mm N/A 22.0 mm N/A 27.0 mm
    HBZ 25-18 N/A CPI™ to CPI™ N/A 25.0 mm N/A 18.0 mm N/A 60.5 mm N/A 26.5 mm N/A 22.0 mm N/A 35.0 mm
    HBZ 25-20 N/A CPI™ to CPI™ N/A 25.0 mm N/A 20.0 mm N/A 62.3 mm N/A 26.5 mm N/A 22.0 mm N/A 35.0 mm
    M3RUM2 N/A A-LOK® to A-LOK® N/A 3.0 mm N/A 2.0 mm N/A 35.8 mm N/A 15.3 mm N/A 15.3 mm N/A 12.0 mm
    M6RUM2 N/A A-LOK® to A-LOK® N/A 6.0 mm N/A 2.0 mm N/A 38.7 mm N/A 17.7 mm N/A 15.3 mm N/A 14.0 mm
    M6RUM3 N/A A-LOK® to A-LOK® N/A 6.0 mm N/A 3.0 mm N/A 38.7 mm N/A 17.7 mm N/A 15.3 mm N/A 14.0 mm
    M6RUM4 N/A A-LOK® to A-LOK® N/A 6.0 mm N/A 4.0 mm N/A 39.5 mm N/A 17.7 mm N/A 16.1 mm N/A 14.0 mm
    M8RUM6 N/A A-LOK® to A-LOK® N/A 8.0 mm N/A 6.0 mm N/A 42.4 mm N/A 18.6 mm N/A 17.7 mm N/A 15.0 mm
    M10RUM6 N/A A-LOK® to A-LOK® N/A 10.0 mm N/A 6.0 mm N/A 44.5 mm N/A 19.5 mm N/A 17.7 mm N/A 18.0 mm
    M10RUM8 N/A A-LOK® to A-LOK® N/A 10.0 mm N/A 8.0 mm N/A 44.5 mm N/A 19.5 mm N/A 18.6 mm N/A 18.0 mm
    M12RUM6 N/A A-LOK® to A-LOK® N/A 12.0 mm N/A 6.0 mm N/A 47.0 mm N/A 22.0 mm N/A 17.7 mm N/A 22.0 mm
    M12RUM8 N/A A-LOK® to A-LOK® N/A 12.0 mm N/A 8.0 mm N/A 47.8 mm N/A 22.0 mm N/A 18.6 mm N/A 22.0 mm
    M12RUM10 N/A A-LOK® to A-LOK® N/A 12.0 mm N/A 10.0 mm N/A 48.7 mm N/A 22.0 mm N/A 19.5 mm N/A 22.0 mm
    Unit of Measure
    1 2