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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 and C dimensions are typical finger-tight.
  • Tube stub is pre-grooved as standard.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
    • Tube End Reducer for metric tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    T1 Turned End Tube O.D.

    T2 Machined End Tube O.D.

    A

    C

    K

    W HEX

    Bore

    M12TURM8 N/A Tube to A-LOK® N/A 12.0 mm N/A 8.0 mm N/A 47.6 mm N/A 18.6 mm N/A 23.0 mm N/A 15.0 mm N/A 6.4 mm
    M12TURM10 N/A Tube to A-LOK® N/A 12.0 mm N/A 10.0 mm N/A 49.7 mm N/A 19.5 mm N/A 23.0 mm N/A 18.0 mm N/A 7.9 mm
    M12TURM16 N/A Tube to A-LOK® N/A 12.0 mm N/A 16.0 mm N/A 53.0 mm N/A 22.0 mm N/A 23.0 mm N/A 24.0 mm N/A 9.1 mm
    M12TURM18 N/A Tube to A-LOK® N/A 12.0 mm N/A 18.0 mm N/A 54.6 mm N/A 22.0 mm N/A 23.0 mm N/A 27.0 mm N/A 9.1 mm
    M15TURM10 N/A Tube to A-LOK® N/A 15.0 mm N/A 10.0 mm N/A 51.3 mm N/A 19.5 mm N/A 23.8 mm N/A 27.0 mm N/A 7.9 mm
    M16TURM12 N/A Tube to A-LOK® N/A 16.0 mm N/A 12.0 mm N/A 53.8 mm N/A 22.0 mm N/A 24.6 mm N/A 22.0 mm N/A 9.5 mm
    M16TURM18 N/A Tube to A-LOK® N/A 16.0 mm N/A 18.0 mm N/A 56.1 mm N/A 22.0 mm N/A 24.6 mm N/A 27.0 mm N/A 12.7 mm
    M16TURM20 N/A Tube to A-LOK® N/A 16.0 mm N/A 20.0 mm N/A 57.9 mm N/A 22.0 mm N/A 24.6 mm N/A 27.0 mm N/A 12.7 mm
    M16TURM25 N/A Tube to A-LOK® N/A 16.0 mm N/A 25.0 mm N/A 63.2 mm N/A 26.5 mm N/A 24.8 mm N/A 26.5 mm N/A 13.0 mm
    M18TURM12 N/A Tube to A-LOK® N/A 18.0 mm N/A 12.0 mm N/A 53.8 mm N/A 22.0 mm N/A 24.6 mm N/A 22.0 mm N/A 9.5 mm
    M18TURM16 N/A Tube to A-LOK® N/A 18.0 mm N/A 16.0 mm N/A 54.7 mm N/A 22.0 mm N/A 24.8 mm N/A 22.0 mm N/A 15.0 mm
    M18TURM20 N/A Tube to A-LOK® N/A 18.0 mm N/A 20.0 mm N/A 57.9 mm N/A 22.0 mm N/A 24.6 mm N/A 30.0 mm N/A 13.9 mm
    M18TURM25 N/A Tube to A-LOK® N/A 18.0 mm N/A 25.0 mm N/A 63.1 mm N/A 26.5 mm N/A 24.6 mm N/A 35.0 mm N/A 14.0 mm
    M20TURM12 N/A Tube to A-LOK® N/A 20.0 mm N/A 12.0 mm N/A 56.1 mm N/A 22.0 mm N/A 25.4 mm N/A 22.0 mm N/A 9.5 mm
    M20TURM16 N/A Tube to A-LOK® N/A 20.0 mm N/A 16.0 mm N/A 55.3 mm N/A 22.0 mm N/A 25.6 mm N/A 22.0 mm N/A 16.0 mm
    M20TURM18 N/A Tube to A-LOK® N/A 20.0 mm N/A 18.0 mm N/A 57.6 mm N/A 22.0 mm N/A 25.4 mm N/A 27.0 mm N/A 15.1 mm
    M20TURM25 N/A Tube to A-LOK® N/A 20.0 mm N/A 25.0 mm N/A 64.5 mm N/A 26.5 mm N/A 25.4 mm N/A 35.0 mm N/A 15.1 mm
    M22TURM18 N/A Tube to A-LOK® N/A 22.0 mm N/A 18.0 mm N/A 56.1 mm N/A 22.0 mm N/A 26.2 mm N/A 27.0 mm N/A 15.1 mm
    M22TURM20 N/A Tube to A-LOK® N/A 22.0 mm N/A 20.0 mm N/A 57.7 mm N/A 22.0 mm N/A 26.2 mm N/A 30.0 mm N/A 15.8 mm
    M25TURM12 N/A Tube to A-LOK® N/A 25.0 mm N/A 12.0 mm N/A 60.9 mm N/A 22.0 mm N/A 31.8 mm N/A 27.0 mm N/A 9.5 mm
    M25TURM16 N/A Tube to A-LOK® N/A 25.0 mm N/A 16.0 mm N/A 64.0 mm N/A 22.0 mm N/A 32.0 mm N/A 27.0 mm N/A 20.0 mm
    M25TURM18 N/A Tube to A-LOK® N/A 25.0 mm N/A 18.0 mm N/A 62.5 mm N/A 22.0 mm N/A 31.8 mm N/A 27.0 mm N/A 15.1 mm
    M25TURM20 N/A Tube to A-LOK® N/A 25.0 mm N/A 20.0 mm N/A 64.2 mm N/A 22.0 mm N/A 31.8 mm N/A 30.0 mm N/A 15.8 mm
    Unit of Measure
    1 2