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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 reducer sizes call out short end first.
  • For replacement bulkhead nuts, see page 77, Part WLZ.
  • Bulkhead Union for fractional tube
    Unit of Measure
    Items Bulkhead Union for fractional tube
    1-1 WBZ
    Bulkhead Union for fractional tube
    Bulkhead Union for fractional tube
    2-2 WBZ
    Bulkhead Union for fractional tube
    Bulkhead Union for fractional tube
    2-4 WBZ
    Bulkhead Union for fractional tube
    Bulkhead Union for fractional tube
    3-3 WBZ
    Bulkhead Union for fractional tube
    Bulkhead Union for fractional tube
    4-2 WBZ
    Bulkhead Union for fractional tube
    Connection Type N/A CPI™ to CPI™
    T1 Tube O.D. N/A 1/16 in N/A 1/8 in N/A 1/8 in N/A 3/16 in N/A 1/4 in
    T2 Tube O.D. N/A 1/16 in N/A 1/8 in N/A 1/4 in N/A 3/16 in N/A 1/8 in
    A N/A 1.26 in N/A 2.01 in N/A 2.17 in N/A 2.12 in N/A 2.18 in
    C1 N/A .44 in N/A .60 in N/A .60 in N/A .64 in N/A .70 in
    C2 N/A .69 in N/A 1.23 in N/A 1.33 in N/A 1.27 in N/A 1.23 in
    L1 N/A .41 in N/A .53 in N/A .59 in N/A .59 in N/A .66 in
    L2 N/A .53 in N/A .97 in N/A 1.03 in N/A 1.00 in N/A .97 in
    W HEX N/A 5/16 in N/A 1/2 in N/A 5/8 in N/A 9/16 in N/A 1/2 in
    Bulkhead Hole Drill Size N/A 13/64 in N/A 21/64 in N/A 29/64 in N/A 25/64 in N/A 21/64 in
    Maximum Bulkhead Thickness N/A 1/8 in N/A 1/2 in N/A 17/32 in N/A 1/2 in N/A 1/2 in