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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.
  • C dimension is typical finger-tight.
    • NPT Male Elbow for metric tube
    Unit of Measure
    1 2 3 

    Item #

    Connection Type

    Tube O.D.

    NPT Pipe Thread

    C

    H

    L

    R

    W HEX

    CBZ 3-1/8 N/A CPI™ to NPT N/A 3.0 mm N/A 1/8 N/A 23.6 mm N/A 17.8 mm N/A 17.0 mm N/A 9.7 mm N/A 7/16 in
    CBZ 3-1/4 N/A CPI™ to NPT N/A 3.0 mm N/A 1/4 N/A 24.6 mm N/A 23.4 mm N/A 18.0 mm N/A 14.5 mm N/A 1/2 in
    CBZ 4-1/8 N/A CPI™ to NPT N/A 4.0 mm N/A 1/8 N/A 25.4 mm N/A 18.8 mm N/A 19.2 mm N/A 9.7 mm N/A 1/2 in
    CBZ 4-1/4 N/A CPI™ to NPT N/A 4.0 mm N/A 1/4 N/A 26.2 mm N/A 25.4 mm N/A 19.6 mm N/A 14.5 mm N/A 1/2 in
    CBZ 6-1/8 N/A CPI™ to NPT N/A 6.0 mm N/A 1/8 N/A 27.0 mm N/A 18.8 mm N/A 19.6 mm N/A 9.7 mm N/A 1/2 in
    CBZ 6-1/4 N/A CPI™ to NPT N/A 6.0 mm N/A 1/4 N/A 27.0 mm N/A 23.4 mm N/A 19.6 mm N/A 14.5 mm N/A 1/2 in
    CBZ 6-3/8 N/A CPI™ to NPT N/A 6.0 mm N/A 3/8 N/A 29.8 mm N/A 26.2 mm N/A 22.4 mm N/A 14.5 mm N/A 11/16 in
    CBZ 6-1/2 N/A CPI™ to NPT N/A 6.0 mm N/A 1/2 N/A 31.8 mm N/A 33.0 mm N/A 24.4 mm N/A 19.2 mm N/A 13/16 in
    CBZ 8-1/8 N/A CPI™ to NPT N/A 8.0 mm N/A 1/8 N/A 28.8 mm N/A 19.8 mm N/A 21.3 mm N/A 9.7 mm N/A 9/16 in
    CBZ 8-1/4 N/A CPI™ to NPT N/A 8.0 mm N/A 1/4 N/A 28.8 mm N/A 24.4 mm N/A 21.3 mm N/A 14.5 mm N/A 9/16 in
    CBZ 8-3/8 N/A CPI™ to NPT N/A 8.0 mm N/A 3/8 N/A 30.6 mm N/A 26.2 mm N/A 23.1 mm N/A 14.5 mm N/A 11/16 in
    CBZ 8-1/2 N/A CPI™ to NPT N/A 8.0 mm N/A 1/2 N/A 32.7 mm N/A 33.0 mm N/A 25.2 mm N/A 19.2 mm N/A 13/16 in
    CBZ 10-1/8 N/A CPI™ to NPT N/A 10.0 mm N/A 1/8 N/A 31.5 mm N/A 21.6 mm N/A 23.9 mm N/A 9.7 mm N/A 11/16 in
    CBZ 10-1/4 N/A CPI™ to NPT N/A 10.0 mm N/A 1/4 N/A 31.5 mm N/A 26.2 mm N/A 23.9 mm N/A 14.5 mm N/A 11/16 in
    CBZ 10-3/8 N/A CPI™ to NPT N/A 10.0 mm N/A 3/8 N/A 31.5 mm N/A 26.2 mm N/A 23.9 mm N/A 14.5 mm N/A 11/16 in
    CBZ 10-1/2 N/A CPI™ to NPT N/A 10.0 mm N/A 1/2 N/A 33.5 mm N/A 33.0 mm N/A 25.9 mm N/A 19.2 mm N/A 13/16 in
    CBZ 12-1/4 N/A CPI™ to NPT N/A 12.0 mm N/A 1/4 N/A 36.0 mm N/A 28.2 mm N/A 25.9 mm N/A 14.5 mm N/A 13/16 in
    CBZ 12-3/8 N/A CPI™ to NPT N/A 12.0 mm N/A 3/8 N/A 36.0 mm N/A 28.2 mm N/A 25.9 mm N/A 14.5 mm N/A 13/16 in
    CBZ 12-1/2 N/A CPI™ to NPT N/A 12.0 mm N/A 1/2 N/A 36.0 mm N/A 33.0 mm N/A 25.9 mm N/A 19.2 mm N/A 13/16 in
    CBZ 12-3/4 N/A CPI™ to NPT N/A 12.0 mm N/A 3/4 N/A 39.8 mm N/A 36.8 mm N/A 29.7 mm N/A 19.2 mm N/A 1 1/16 in
    CBZ 15-1/2 N/A CPI™ to NPT N/A 15.0 mm N/A 1/2 N/A 38.0 mm N/A 35.1 mm N/A 27.9 mm N/A 19.2 mm N/A 15/16 in
    CBZ 16-3/8 N/A CPI™ to NPT N/A 16.0 mm N/A 3/8 N/A 38.0 mm N/A 30.2 mm N/A 27.9 mm N/A 14.5 mm N/A 15/16 in
    CBZ 16-1/2 N/A CPI™ to NPT N/A 16.0 mm N/A 1/2 N/A 38.0 mm N/A 35.1 mm N/A 27.9 mm N/A 19.2 mm N/A 15/16 in
    CBZ 16-3/4 N/A CPI™ to NPT N/A 16.0 mm N/A 3/4 N/A 39.8 mm N/A 36.8 mm N/A 29.7 mm N/A 19.2 mm N/A 1 1/16 in
    CBZ 18-1/2 N/A CPI™ to NPT N/A 18.0 mm N/A 1/2 N/A 39.8 mm N/A 36.8 mm N/A 29.7 mm N/A 19.2 mm N/A 1 1/16 in
    Unit of Measure
    1 2 3