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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.
  • Used to provide a seal with male or female parallel ISO threads.
  • Please note the pressure ratings are based on taper threaded ends. The pressure rating for the BSPP ends are dependent on the type of sealing washer used.
  • Copper Washers
    Unit of Measure
    1 

    Item #

    Thread

    D

    d

    H

    M28329-CU N/A 1/8 N/A .71 in N/A .39 in N/A .09 in
    M28330-CU N/A 1/4 N/A .87 in N/A .55 in N/A .09 in
    M28331-CU N/A 3/8 N/A .94 in N/A .67 in N/A .09 in
    M28332-CU N/A 1/2 N/A 1.18 in N/A .87 in N/A .10 in
    M28334-CU N/A 3/4 N/A 1.38 in N/A 1.06 in N/A .09 in
    M28336-CU N/A 1 N/A 1.65 in N/A 1.34 in N/A .09 in
    M25179-CU N/A 1/8 N/A .32 in N/A .19 in N/A .06 in
    M25180-CU N/A 1/4 N/A .44 in N/A .25 in N/A .06 in
    M25181-CU N/A 3/8 N/A .57 in N/A .38 in N/A .06 in
    M25182-CU N/A 1/2 N/A .72 in N/A .50 in N/A .06 in
    M25184-CU N/A 3/4 N/A .94 in N/A .72 in N/A .06 in
    M25186-CU N/A 1 N/A 1.18 in N/A .97 in N/A .09 in
    Unit of Measure
    1