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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..
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    Item #

    Connection Type

    NPT Pipe Thread

    A

    C

    L

    R

    W HEX

    N/A CPI™ to NPT N/A 1/16 N/A 1.19 in N/A .68 in N/A .53 in N/A .38 in N/A 5/16 in
    N/A CPI™ to NPT N/A 1/8 N/A 1.27 in N/A .68 in N/A .53 in N/A .38 in N/A 7/16 in
    N/A CPI™ to NPT N/A 1/8 N/A 1.83 in N/A 1.23 in N/A .97 in N/A .38 in N/A 1/2 in
    N/A CPI™ to NPT N/A 1/8 N/A 1.89 in N/A 1.26 in N/A 1.00 in N/A .38 in N/A 9/16 in
    N/A CPI™ to NPT N/A 1/8 N/A 1.95 in N/A 1.31 in N/A 1.02 in N/A .38 in N/A 5/8 in
    N/A CPI™ to NPT N/A 1/4 N/A 2.13 in N/A 1.31 in N/A 1.02 in N/A .56 in N/A 5/8 in
    N/A CPI™ to NPT N/A 3/8 N/A 2.16 in N/A 1.31 in N/A 1.02 in N/A .56 in N/A 11/16 in
    N/A CPI™ to NPT N/A 1/2 N/A 2.37 in N/A 1.31 in N/A 1.02 in N/A .76 in N/A 7/8 in
    N/A CPI™ to NPT N/A 1/8 N/A 2.08 in N/A 1.42 in N/A 1.12 in N/A .38 in N/A 11/16 in
    N/A CPI™ to NPT N/A 1/4 N/A 2.27 in N/A 1.42 in N/A 1.12 in N/A .56 in N/A 11/16 in
    N/A CPI™ to NPT N/A 1/8 N/A 2.08 in N/A 1.44 in N/A 1.15 in N/A .38 in N/A 3/4 in
    N/A CPI™ to NPT N/A 1/4 N/A 2.27 in N/A 1.44 in N/A 1.15 in N/A .56 in N/A 3/4 in
    N/A CPI™ to NPT N/A 3/8 N/A 2.27 in N/A 1.44 in N/A 1.15 in N/A .56 in N/A 3/4 in
    N/A CPI™ to NPT N/A 1/2 N/A 2.48 in N/A 1.44 in N/A 1.15 in N/A .76 in N/A 7/8 in
    N/A CPI™ to NPT N/A 1/4 N/A 2.49 in N/A 1.65 in N/A 1.25 in N/A .56 in N/A 15/16 in
    N/A CPI™ to NPT N/A 3/8 N/A 2.49 in N/A 1.65 in N/A 1.25 in N/A .56 in N/A 15/16 in
    N/A CPI™ to NPT N/A 1/2 N/A 2.71 in N/A 1.65 in N/A 1.25 in N/A .76 in N/A 15/16 in
    N/A CPI™ to NPT N/A 3/4 N/A 2.72 in N/A 1.65 in N/A 1.25 in N/A .75 in N/A 1 1/8 in
    N/A CPI™ to NPT N/A 3/8 N/A 2.63 in N/A 1.68 in N/A 1.28 in N/A .56 in N/A 1 1/16 in
    N/A CPI™ to NPT N/A 1/2 N/A 2.82 in N/A 1.68 in N/A 1.28 in N/A .76 in N/A 1 1/16 in
    N/A CPI™ to NPT N/A 1/2 N/A 3.00 in N/A 1.87 in N/A 1.47 in N/A .76 in N/A 1 3/16 in
    N/A CPI™ to NPT N/A 3/4 N/A 3.00 in N/A 1.87 in N/A 1.47 in N/A .75 in N/A 1 3/16 in
    N/A CPI™ to NPT N/A 3/4 N/A 3.31 in N/A 2.09 in N/A 1.69 in N/A .75 in N/A 1 3/8 in
    N/A CPI™ to NPT N/A 3/4 N/A 3.54 in N/A 2.27 in N/A 1.78 in N/A .75 in N/A 1 5/8 in
    N/A CPI™ to NPT N/A 1 N/A 3.72 in N/A 2.27 in N/A 1.78 in N/A .94 in N/A 1 5/8 in
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