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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.
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    Item #

    Connection Type

    Tube O.D.

    NPT Pipe Thread

    A

    C

    W HEX

    N/A A-LOK® to FNPT N/A 4.0 mm N/A 1/8 N/A 29.6 mm N/A 16.1 mm N/A 14.0 mm
    N/A A-LOK® to FNPT N/A 6.0 mm N/A 1/8 N/A 31.3 mm N/A 17.7 mm N/A 14.0 mm
    N/A A-LOK® to FNPT N/A 6.0 mm N/A 1/4 N/A 36.1 mm N/A 17.7 mm N/A 19.0 mm
    N/A A-LOK® to FNPT N/A 6.0 mm N/A 3/8 N/A 37.7 mm N/A 17.7 mm N/A 22.0 mm
    N/A A-LOK® to FNPT N/A 6.0 mm N/A 1/2 N/A 42.5 mm N/A 17.7 mm N/A 27.0 mm
    N/A A-LOK® to FNPT N/A 8.0 mm N/A 1/8 N/A 32.1 mm N/A 18.6 mm N/A 14.0 mm
    N/A A-LOK® to FNPT N/A 8.0 mm N/A 1/4 N/A 36.9 mm N/A 18.6 mm N/A 19.0 mm
    N/A A-LOK® to FNPT N/A 8.0 mm N/A 3/8 N/A 38.5 mm N/A 18.6 mm N/A 22.0 mm
    N/A A-LOK® to FNPT N/A 10.0 mm N/A 1/4 N/A 37.8 mm N/A 19.5 mm N/A 19.0 mm
    N/A A-LOK® to FNPT N/A 10.0 mm N/A 3/8 N/A 39.4 mm N/A 19.5 mm N/A 22.0 mm
    N/A A-LOK® to FNPT N/A 10.0 mm N/A 1/2 N/A 44.1 mm N/A 19.5 mm N/A 27.0 mm
    N/A A-LOK® to FNPT N/A 12.0 mm N/A 1/4 N/A 41.9 mm N/A 22.0 mm N/A 22.0 mm
    N/A A-LOK® to FNPT N/A 12.0 mm N/A 3/8 N/A 41.9 mm N/A 22.0 mm N/A 22.0 mm
    N/A A-LOK® to FNPT N/A 12.0 mm N/A 1/2 N/A 46.6 mm N/A 22.0 mm N/A 27.0 mm
    N/A A-LOK® to FNPT N/A 16.0 mm N/A 3/8 N/A 41.9 mm N/A 22.0 mm N/A 27.0 mm
    N/A A-LOK® to FNPT N/A 16.0 mm N/A 1/2 N/A 46.9 mm N/A 22.0 mm N/A 27.0 mm
    N/A A-LOK® to FNPT N/A 20.0 mm N/A 1/2 N/A 47.9 mm N/A 22.0 mm N/A 30.0 mm
    N/A A-LOK® to FNPT N/A 20.0 mm N/A 3/4 N/A 49.7 mm N/A 22.0 mm N/A 35.0 mm
    N/A A-LOK® to FNPT N/A 22.0 mm N/A 3/4 N/A 49.7 mm N/A 22.0 mm N/A 35.0 mm
    N/A A-LOK® to FNPT N/A 25.0 mm N/A 3/4 N/A 53.6 mm N/A 26.5 mm N/A 35.0 mm
    N/A A-LOK® to FNPT N/A 25.0 mm N/A 1 N/A 62.3 mm N/A 26.5 mm N/A 41.0 mm
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