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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.
  • Tube stub is pre-grooved as standard. (Size M2, M3, and M4 not grooved).
  • The machined ferrule end (T2) requires only 1/4 turn from finger tight to assemble.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
  • Port Connector for metric tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    TUBE O.D. T1

    TUBE O.D. T2

    A

    K

    Bore

    ZPC 3-3 N/A Tube for CPI™ N/A 3.0 mm N/A 3.0 mm N/A 22.2 mm N/A 15.7 mm N/A 1.6 mm
    ZPC 6-6 N/A Tube for CPI™ N/A 6.0 mm N/A 6.0 mm N/A 24.6 mm N/A 18.7 mm N/A 3.0 mm
    ZPC 8-8 N/A Tube for CPI™ N/A 8.0 mm N/A 8.0 mm N/A 25.9 mm N/A 20.0 mm N/A 5.0 mm
    ZPC 10-10 N/A Tube for CPI™ N/A 10.0 mm N/A 10.0 mm N/A 26.1 mm N/A 20.2 mm N/A 6.0 mm
    ZPC 12-12 N/A Tube for CPI™ N/A 12.0 mm N/A 12.0 mm N/A 35.8 mm N/A 26.0 mm N/A 8.0 mm
    ZPC 16-16 N/A Tube for CPI™ N/A 16.0 mm N/A 16.0 mm N/A 40.5 mm N/A 27.7 mm N/A 12.0 mm
    ZPC 18-18 N/A Tube for CPI™ N/A 18.0 mm N/A 18.0 mm N/A 40.8 mm N/A 27.7 mm N/A 13.0 mm
    ZPC 3-6 N/A Tube for CPI™ N/A 3.0 mm N/A 6.0 mm N/A 22.6 mm N/A 13.5 mm N/A 1.6 mm
    ZPC 6-8 N/A Tube for CPI™ N/A 6.0 mm N/A 8.0 mm N/A 25.5 mm N/A 16.1 mm N/A 3.0 mm
    ZPC 6-10 N/A Tube for CPI™ N/A 6.0 mm N/A 10.0 mm N/A 25.5 mm N/A 16.1 mm N/A 3.0 mm
    ZPC 6-12 N/A Tube for CPI™ N/A 6.0 mm N/A 12.0 mm N/A 31.2 mm N/A 16.1 mm N/A 3.0 mm
    ZPC 8-10 N/A Tube for CPI™ N/A 8.0 mm N/A 10.0 mm N/A 29.5 mm N/A 16.8 mm N/A 5.0 mm
    ZPC 8-12 N/A Tube for CPI™ N/A 8.0 mm N/A 12.0 mm N/A 31.4 mm N/A 16.8 mm N/A 5.0 mm
    PCM3 N/A Tube for A-LOK® N/A 3.0 mm N/A 3.0 mm N/A 22.2 mm N/A 15.7 mm N/A 1.6 mm
    PCM6 N/A Tube for A-LOK® N/A 6.0 mm N/A 6.0 mm N/A 24.6 mm N/A 18.7 mm N/A 3.0 mm
    PCM8 N/A Tube for A-LOK® N/A 8.0 mm N/A 8.0 mm N/A 25.9 mm N/A 20.0 mm N/A 5.0 mm
    PCM10 N/A Tube for A-LOK® N/A 10.0 mm N/A 10.0 mm N/A 26.1 mm N/A 20.2 mm N/A 6.0 mm
    PCM12 N/A Tube for A-LOK® N/A 12.0 mm N/A 12.0 mm N/A 35.8 mm N/A 26.0 mm N/A 8.0 mm
    PCM16 N/A Tube for A-LOK® N/A 16.0 mm N/A 16.0 mm N/A 40.5 mm N/A 27.7 mm N/A 12.0 mm
    PCM18 N/A Tube for A-LOK® N/A 18.0 mm N/A 18.0 mm N/A 40.8 mm N/A 27.7 mm N/A 13.0 mm
    M3PCM6 N/A Tube for A-LOK® N/A 3.0 mm N/A 6.0 mm N/A 22.6 mm N/A 13.5 mm N/A 1.6 mm
    M6PCM8 N/A Tube for A-LOK® N/A 6.0 mm N/A 8.0 mm N/A 25.5 mm N/A 16.1 mm N/A 3.0 mm
    M6PCM10 N/A Tube for A-LOK® N/A 6.0 mm N/A 10.0 mm N/A 25.5 mm N/A 16.1 mm N/A 3.0 mm
    M6PCM12 N/A Tube for A-LOK® N/A 6.0 mm N/A 12.0 mm N/A 31.2 mm N/A 16.1 mm N/A 3.0 mm
    M8PCM10 N/A Tube for A-LOK® N/A 8.0 mm N/A 10.0 mm N/A 29.5 mm N/A 16.8 mm N/A 5.0 mm
    Unit of Measure
    1 2