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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, C1 and C2 dimensions are typical finger-tight.
  • For replacement bulkhead nuts, see page 77, Part BN.
  • For reducer sizes call out short end first.
  • Unit of Measure
    Items
    Bulkhead Union for metric tube

    Bulkhead Union for metric tube

    Bulkhead Union for metric tube

    Bulkhead Union for metric tube

    Bulkhead Union for metric tube

    Bulkhead Union for metric tube

    Bulkhead Union for metric tube

    Bulkhead Union for metric tube

    Bulkhead Union for metric tube

    Bulkhead Union for metric tube
    Tube O.D. N/A 3.0 mm N/A 4.0 mm N/A 6.0 mm N/A 8.0 mm N/A 10.0 mm
    A N/A 51.3 mm N/A 53.7 mm N/A 57.9 mm N/A 61.0 mm N/A 63.6 mm
    C1 N/A 15.3 mm N/A 16.1 mm N/A 17.7 mm N/A 18.6 mm N/A 19.5 mm
    C2 N/A 31.2 mm N/A 32.0 mm N/A 33.6 mm N/A 36.7 mm N/A 37.0 mm
    L N/A 24.6 mm N/A 25.4 mm N/A 26.2 mm N/A 28.7 mm N/A 29.3 mm
    W HEX N/A 14.0 mm N/A 14.0 mm N/A 16.0 mm N/A 18.0 mm N/A 22.0 mm
    Bulkhead Hole Drill Size N/A 8.3 mm N/A 9.9 mm N/A 11.5 mm N/A 13.1 mm N/A 16.3 mm
    Maximum Bulkhead Thickness N/A 12.7 mm N/A 12.7 mm N/A 10.2 mm N/A 11.2 mm N/A 11.2 mm