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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.
    • NPT Male Connector for metric tube
    Unit of Measure
    1 2 3 4 

    Item #

    Connection Type

    Tube O.D.

    NPT Pipe Thread

    A

    C

    R

    W HEX

    FBZ 2-1/8 N/A CPI™ to NPT N/A 2.0 mm N/A 1/8 N/A 29.7 mm N/A 15.3 mm N/A 9.7 mm N/A 12.0 mm
    FBZ 3-1/8 N/A CPI™ to NPT N/A 3.0 mm N/A 1/8 N/A 29.7 mm N/A 15.3 mm N/A 9.7 mm N/A 12.0 mm
    FBZ 3-1/4 N/A CPI™ to NPT N/A 3.0 mm N/A 1/4 N/A 35.3 mm N/A 15.3 mm N/A 14.5 mm N/A 14.0 mm
    FBZ 4-1/8 N/A CPI™ to NPT N/A 4.0 mm N/A 1/8 N/A 31.2 mm N/A 16.1 mm N/A 9.7 mm N/A 12.0 mm
    FBZ 4-1/4 N/A CPI™ to NPT N/A 4.0 mm N/A 1/4 N/A 36.3 mm N/A 16.1 mm N/A 14.5 mm N/A 14.0 mm
    FBZ 6-1/8 N/A CPI™ to NPT N/A 6.0 mm N/A 1/8 N/A 32.9 mm N/A 17.7 mm N/A 9.7 mm N/A 14.0 mm
    FBZ 6-1/4 N/A CPI™ to NPT N/A 6.0 mm N/A 1/4 N/A 38.1 mm N/A 17.7 mm N/A 14.5 mm N/A 14.0 mm
    FBZ 6-3/8 N/A CPI™ to NPT N/A 6.0 mm N/A 3/8 N/A 38.5 mm N/A 17.7 mm N/A 14.5 mm N/A 18.0 mm
    FBZ 6-1/2 N/A CPI™ to NPT N/A 6.0 mm N/A 1/2 N/A 44.8 mm N/A 17.7 mm N/A 19.2 mm N/A 22.0 mm
    FBZ 8-1/8 N/A CPI™ to NPT N/A 8.0 mm N/A 1/8 N/A 34.2 mm N/A 18.6 mm N/A 9.7 mm N/A 15.0 mm
    FBZ 8-1/4 N/A CPI™ to NPT N/A 8.0 mm N/A 1/4 N/A 38.8 mm N/A 18.6 mm N/A 14.5 mm N/A 15.0 mm
    FBZ 8-3/8 N/A CPI™ to NPT N/A 8.0 mm N/A 3/8 N/A 39.3 mm N/A 18.6 mm N/A 14.5 mm N/A 18.0 mm
    FBZ 8-1/2 N/A CPI™ to NPT N/A 8.0 mm N/A 1/2 N/A 45.6 mm N/A 18.6 mm N/A 19.2 mm N/A 22.0 mm
    FBZ 10-1/8 N/A CPI™ to NPT N/A 10.0 mm N/A 1/8 N/A 36.1 mm N/A 19.5 mm N/A 9.7 mm N/A 18.0 mm
    FBZ 10-1/4 N/A CPI™ to NPT N/A 10.0 mm N/A 1/4 N/A 40.9 mm N/A 19.5 mm N/A 14.5 mm N/A 18.0 mm
    FBZ 10-3/8 N/A CPI™ to NPT N/A 10.0 mm N/A 3/8 N/A 40.9 mm N/A 19.5 mm N/A 14.5 mm N/A 18.0 mm
    FBZ 10-1/2 N/A CPI™ to NPT N/A 10.0 mm N/A 1/2 N/A 47.5 mm N/A 19.5 mm N/A 19.2 mm N/A 22.0 mm
    FBZ 10-3/4 N/A CPI™ to NPT N/A 10.0 mm N/A 3/4 N/A 46.4 mm N/A 19.5 mm N/A 19.2 mm N/A 27.0 mm
    FBZ 10-1 N/A CPI™ to NPT N/A 10.0 mm N/A 1 N/A 55.0 mm N/A 19.5 mm N/A 24.0 mm N/A 35.0 mm
    FBZ 12-1/4 N/A CPI™ to NPT N/A 12.0 mm N/A 1/4 N/A 43.4 mm N/A 22.0 mm N/A 14.5 mm N/A 22.0 mm
    FBZ 12-3/8 N/A CPI™ to NPT N/A 12.0 mm N/A 3/8 N/A 43.4 mm N/A 22.0 mm N/A 14.5 mm N/A 22.0 mm
    FBZ 12-1/2 N/A CPI™ to NPT N/A 12.0 mm N/A 1/2 N/A 49.0 mm N/A 22.0 mm N/A 19.2 mm N/A 22.0 mm
    FBZ 12-3/4 N/A CPI™ to NPT N/A 12.0 mm N/A 3/4 N/A 50.5 mm N/A 22.0 mm N/A 19.2 mm N/A 27.0 mm
    FBZ 14-1/4 N/A CPI™ to NPT N/A 14.0 mm N/A 1/4 N/A 44.2 mm N/A 22.0 mm N/A 14.5 mm N/A 24.0 mm
    FBZ 14-3/8 N/A CPI™ to NPT N/A 14.0 mm N/A 3/8 N/A 44.2 mm N/A 22.0 mm N/A 14.5 mm N/A 24.0 mm
    Unit of Measure
    1 2 3 4