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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 14-1/2 N/A CPI™ to NPT N/A 14.0 mm N/A 1/2 N/A 49.0 mm N/A 22.0 mm N/A 19.2 mm N/A 24.0 mm
    FBZ 15-1/2 N/A CPI™ to NPT N/A 15.0 mm N/A 1/2 N/A 49.0 mm N/A 22.0 mm N/A 19.2 mm N/A 24.0 mm
    FBZ 16-3/8 N/A CPI™ to NPT N/A 16.0 mm N/A 3/8 N/A 44.1 mm N/A 22.0 mm N/A 14.5 mm N/A 24.0 mm
    FBZ 16-1/2 N/A CPI™ to NPT N/A 16.0 mm N/A 1/2 N/A 49.0 mm N/A 22.0 mm N/A 19.2 mm N/A 24.0 mm
    FBZ 16-3/4 N/A CPI™ to NPT N/A 16.0 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 18-1/2 N/A CPI™ to NPT N/A 18.0 mm N/A 1/2 N/A 50.6 mm N/A 22.0 mm N/A 19.2 mm N/A 27.0 mm
    FBZ 18-3/4 N/A CPI™ to NPT N/A 18.0 mm N/A 3/4 N/A 50.6 mm N/A 22.0 mm N/A 19.2 mm N/A 27.0 mm
    FBZ 20-1/2 N/A CPI™ to NPT N/A 20.0 mm N/A 1/2 N/A 50.6 mm N/A 22.0 mm N/A 19.2 mm N/A 30.0 mm
    FBZ 20-3/4 N/A CPI™ to NPT N/A 20.0 mm N/A 3/4 N/A 52.3 mm N/A 22.0 mm N/A 19.2 mm N/A 30.0 mm
    FBZ 20-1 N/A CPI™ to NPT N/A 20.0 mm N/A 1 N/A 57.7 mm N/A 22.0 mm N/A 24.0 mm N/A 35.0 mm
    FBZ 22-3/4 N/A CPI™ to NPT N/A 22.0 mm N/A 3/4 N/A 52.3 mm N/A 22.0 mm N/A 19.2 mm N/A 35.0 mm
    FBZ 24-1/2 N/A CPI™ to NPT N/A 25.0 mm N/A 1/2 N/A 57.5 mm N/A 26.5 mm N/A 19.2 mm N/A 35.0 mm
    FBZ 25-3/4 N/A CPI™ to NPT N/A 25.0 mm N/A 3/4 N/A 57.5 mm N/A 26.5 mm N/A 19.2 mm N/A 35.0 mm
    FBZ 25-1 N/A CPI™ to NPT N/A 25.0 mm N/A 1 N/A 62.3 mm N/A 26.5 mm N/A 24.0 mm N/A 35.0 mm
    M2MSC1/8N N/A A-LOK® 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
    M3MSC1/8N N/A A-LOK® 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
    M3MSC1/4N N/A A-LOK® 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
    M4MSC1/8N N/A A-LOK® 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
    M4MSC1/4N N/A A-LOK® 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
    M6MSC1/8N N/A A-LOK® 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
    M6MSC1/4N N/A A-LOK® 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
    M6MSC3/8N N/A A-LOK® 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
    M6MSC1/2N N/A A-LOK® 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
    M8MSC1/8N N/A A-LOK® 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
    M8MSC1/4N N/A A-LOK® 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
    Unit of Measure
    1 2 3 4