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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.
  • For bulkhead hole drill size and maximum bulkhead thickness, see page 32, Part BC..
    • NPT Female Bulkhead Connector for metric tube
    Unit of Measure
    Items NPT Female Bulkhead Connector for metric tube
    GH2BZ 6-1/8
    NPT Female Bulkhead Connector for metric tube     		NPT Female Bulkhead Connector for metric tube
    GH2BZ 6-1/4
    NPT Female Bulkhead Connector for metric tube     		NPT Female Bulkhead Connector for metric tube
    GH2BZ 8-1/8
    NPT Female Bulkhead Connector for metric tube     		NPT Female Bulkhead Connector for metric tube
    GH2BZ 10-1/4
    NPT Female Bulkhead Connector for metric tube     		NPT Female Bulkhead Connector for metric tube
    GH2BZ 12-3/8
    NPT Female Bulkhead Connector for metric tube
    Connection Type N/A CPI™ to FNPT
    Tube O.D. N/A 6.0 mm N/A 6.0 mm N/A 8.0 mm N/A 10.0 mm N/A 12.0 mm
    NPT Pipe Thread N/A 1/8 N/A 1/4 N/A 1/8 N/A 1/4 N/A 3/8
    A N/A 47.2 mm N/A 52.0 mm N/A 49.6 mm N/A 55.2 mm N/A 60.9 mm
    C N/A 33.6 mm N/A 33.6 mm N/A 36.7 mm N/A 37.0 mm N/A 41.8 mm
    L N/A 26.2 mm N/A 26.2 mm N/A 28.7 mm N/A 29.3 mm N/A 31.7 mm
    W HEX N/A 16.0 mm N/A 19.0 mm N/A 18.0 mm N/A 19.0 mm N/A 24.0 mm
    B’head Hole Drill Size N/A 11.5 mm N/A 11.5 mm N/A 13.1 mm N/A 16.3 mm N/A 19.5 mm
    Max. B’head Thick. N/A 10.2 mm N/A 10.2 mm N/A 11.2 mm N/A 11.2 mm N/A 12.7 mm