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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.
  • Copper washer must be used for this design.
  • Tube stub is pre-grooved as standard.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
    • BSPP Female Adapter for metric tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    Tube O.D.

    BSPP Thread

    A

    K

    W HEX

    Bore

    T2HG 3-1/8R N/A Tube to FBSPP N/A 3.0 mm N/A 1/8 N/A 28.6 mm N/A 13.5 mm N/A 14.0 mm N/A 1.8 mm
    T2HG 3-1/4R N/A Tube to FBSPP N/A 3.0 mm N/A 1/4 N/A 28.6 mm N/A 13.7 mm N/A 19.0 mm N/A 1.6 mm
    T2HG 4-1/8R N/A Tube to FBSPP N/A 4.0 mm N/A 1/8 N/A 29.4 mm N/A 14.3 mm N/A 14.0 mm N/A 2.0 mm
    T2HG 6-1/8R N/A Tube to FBSPP N/A 6.0 mm N/A 1/8 N/A 31.0 mm N/A 15.9 mm N/A 14.0 mm N/A 4.0 mm
    T2HG 6-1/4R N/A Tube to FBSPP N/A 6.0 mm N/A 1/4 N/A 37.3 mm N/A 15.9 mm N/A 19.0 mm N/A 4.0 mm
    T2HG 8-1/4R N/A Tube to FBSPP N/A 8.0 mm N/A 1/4 N/A 38.1 mm N/A 16.7 mm N/A 19.0 mm N/A 6.4 mm
    T2HG 10-1/4R N/A Tube to FBSPP N/A 10.0 mm N/A 1/4 N/A 38.9 mm N/A 17.5 mm N/A 19.0 mm N/A 7.5 mm
    T2HG 10-1/2R N/A Tube to FBSPP N/A 10.0 mm N/A 1/2 N/A 43.7 mm N/A 17.5 mm N/A 27.0 mm N/A 7.5 mm
    T2HG 12-3/8R N/A Tube to FBSPP N/A 12.0 mm N/A 3/8 N/A 44.5 mm N/A 23.0 mm N/A 22.0 mm N/A 9.1 mm
    T2HG 12-1/2R N/A Tube to FBSPP N/A 12.0 mm N/A 1/2 N/A 48.4 mm N/A 23.0 mm N/A 27.0 mm N/A 9.1 mm
    T2HG 16-1/2R N/A Tube to FBSPP N/A 16.0 mm N/A 1/2 N/A 50.0 mm N/A 24.6 mm N/A 27.0 mm N/A 12.7 mm
    T2HG 18-3/4R N/A Tube to FBSPP N/A 18.0 mm N/A 3/4 N/A 53.2 mm N/A 24.6 mm N/A 33.0 mm N/A 14.0 mm
    T2HG 20-3/4R N/A Tube to FBSPP N/A 20.0 mm N/A 3/4 N/A 54.0 mm N/A 25.4 mm N/A 33.0 mm N/A 15.1 mm
    T2HG 25-1R N/A Tube to FBSPP N/A 25.0 mm N/A 1 N/A 67.5 mm N/A 31.8 mm N/A 41.0 mm N/A 19.8 mm
    M3FA1/8R N/A Tube to FBSPP N/A 3.0 mm N/A 1/8 N/A 28.6 mm N/A 13.5 mm N/A 14.0 mm N/A 1.8 mm
    M3FA1/4R N/A Tube to FBSPP N/A 3.0 mm N/A 1/4 N/A 28.6 mm N/A 13.7 mm N/A 19.0 mm N/A 1.6 mm
    M4FA1/8R N/A Tube to FBSPP N/A 4.0 mm N/A 1/8 N/A 29.4 mm N/A 14.3 mm N/A 14.0 mm N/A 2.0 mm
    M6FA1/8R N/A Tube to FBSPP N/A 6.0 mm N/A 1/8 N/A 31.0 mm N/A 15.9 mm N/A 14.0 mm N/A 4.0 mm
    M6FA1/4R N/A Tube to FBSPP N/A 6.0 mm N/A 1/4 N/A 37.3 mm N/A 15.9 mm N/A 19.0 mm N/A 4.0 mm
    M8FA1/4R N/A Tube to FBSPP N/A 8.0 mm N/A 1/4 N/A 38.1 mm N/A 16.7 mm N/A 19.0 mm N/A 6.4 mm
    M10FA1/4R N/A Tube to FBSPP N/A 10.0 mm N/A 1/4 N/A 38.9 mm N/A 17.5 mm N/A 19.0 mm N/A 7.5 mm
    M10FA1/2R N/A Tube to FBSPP N/A 10.0 mm N/A 1/2 N/A 43.7 mm N/A 17.5 mm N/A 27.0 mm N/A 7.5 mm
    M12FA3/8R N/A Tube to FBSPP N/A 12.0 mm N/A 3/8 N/A 44.5 mm N/A 23.0 mm N/A 22.0 mm N/A 9.1 mm
    M12FA1/2R N/A Tube to FBSPP N/A 12.0 mm N/A 1/2 N/A 48.4 mm N/A 23.0 mm N/A 27.0 mm N/A 9.1 mm
    M16FA1/2R N/A Tube to FBSPP N/A 16.0 mm N/A 1/2 N/A 50.0 mm N/A 24.6 mm N/A 27.0 mm N/A 12.7 mm
    Unit of Measure
    1 2