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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.
  • Bulkhead Locknut for metric tube
    Unit of Measure
    Items Bulkhead Locknut for metric tube
    2BN2
    Bulkhead Locknut for metric tube
    Bulkhead Locknut for metric tube
    3BN3
    Bulkhead Locknut for metric tube
    Bulkhead Locknut for metric tube
    4BN4
    Bulkhead Locknut for metric tube
    Bulkhead Locknut for metric tube
    5BN5
    Bulkhead Locknut for metric tube
    Bulkhead Locknut for metric tube
    BNM10
    Bulkhead Locknut for metric tube
    SAE Adj. Str. Thread N/A 5/16-20 N/A 3/8-20 N/A 7/16-20 N/A 1/2-20 N/A 5/8-20
    Tube O.D. N/A 2.0 mm3.0 mm N/A 4.0 mm N/A 6.0 mm N/A 8.0 mm N/A 10.0 mm
    W HEX N/A 13.0 mm N/A 14.0 mm N/A 16.0 mm N/A 17.0 mm N/A 21.0 mm