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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.
  • Size 1, 2, and 3 do not require a groove.
  • Size 4 and above tube stub is pre-grooved as standard. Generic (non-grooved) can be ordered through Quick Response Department.
  • Sizes 20, 24 require additional lubrication prior to assembly.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
  • All tube stubs over 1" come standard with nuts and ferrule(s) pre-assembled (-Z6 option).
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    Item #

    Connection Type

    T1 Turned End Tube O.D.

    T2 Machined End Tube O.D.

    A

    C

    K

    W HEX

    Bore

    N/A Tube to CPI™ N/A 1/8 in N/A 1/16 in N/A 1.10 in N/A .43 in N/A .53 in N/A 5/16 in N/A .05 in
    N/A Tube to CPI™ N/A 3/16 in N/A 1/16 in N/A 1.13 in N/A .43 in N/A .58 in N/A 5/16 in N/A .05 in
    N/A Tube to CPI™ N/A 1/4 in N/A 1/16 in N/A 1.24 in N/A .43 in N/A .63 in N/A 7/16 in N/A .05 in
    N/A Tube to CPI™ N/A 1/16 in N/A 1/8 in N/A 1.18 in N/A .60 in N/A .38 in N/A 7/16 in N/A .03 in
    N/A Tube to CPI™ N/A 1/8 in N/A 1/8 in N/A 1.34 in N/A .60 in N/A .54 in N/A 7/16 in N/A .07 in
    N/A Tube to CPI™ N/A 3/16 in N/A 1/8 in N/A 1.35 in N/A .60 in N/A .58 in N/A 7/16 in N/A .09 in
    N/A Tube to CPI™ N/A 1/4 in N/A 1/8 in N/A 1.42 in N/A .60 in N/A .63 in N/A 7/16 in N/A .09 in
    N/A Tube to CPI™ N/A 3/8 in N/A 1/8 in N/A 1.48 in N/A .60 in N/A .69 in N/A 7/16 in N/A .09 in
    N/A Tube to CPI™ N/A 1/2 in N/A 1/8 in N/A 1.74 in N/A .60 in N/A .91 in N/A 9/16 in N/A .09 in
    N/A Tube to CPI™ N/A 1/8 in N/A 3/16 in N/A 1.37 in N/A .64 in N/A .53 in N/A 7/16 in N/A .08 in
    N/A Tube to CPI™ N/A 1/4 in N/A 3/16 in N/A 1.46 in N/A .64 in N/A .63 in N/A 7/16 in N/A .13 in
    N/A Tube to CPI™ N/A 1/8 in N/A 1/4 in N/A 1.45 in N/A .70 in N/A .53 in N/A 1/2 in N/A .08 in
    N/A Tube to CPI™ N/A 3/16 in N/A 1/4 in N/A 1.48 in N/A .70 in N/A .56 in N/A 1/2 in N/A .12 in
    N/A Tube to CPI™ N/A 1/4 in N/A 1/4 in N/A 1.54 in N/A .70 in N/A .63 in N/A 1/2 in N/A .16 in
    N/A Tube to CPI™ N/A 5/16 in N/A 1/4 in N/A 1.57 in N/A .70 in N/A .66 in N/A 1/2 in N/A .16 in
    N/A Tube to CPI™ N/A 3/8 in N/A 1/4 in N/A 1.60 in N/A .70 in N/A .69 in N/A 1/2 in N/A .19 in
    N/A Tube to CPI™ N/A 1/2 in N/A 1/4 in N/A 1.82 in N/A .70 in N/A .91 in N/A 9/16 in N/A .19 in
    N/A Tube to CPI™ N/A 5/8 in N/A 1/4 in N/A 1.89 in N/A .70 in N/A .97 in N/A 11/16 in N/A .19 in
    N/A Tube to CPI™ N/A 3/4 in N/A 1/4 in N/A 1.88 in N/A .70 in N/A .97 in N/A 13/16 in N/A .19 in
    N/A Tube to CPI™ N/A 3/8 in N/A 5/16 in N/A 1.65 in N/A .73 in N/A .69 in N/A 9/16 in N/A .25 in
    N/A Tube to CPI™ N/A 1/2 in N/A 5/16 in N/A 1.87 in N/A .73 in N/A .91 in N/A 9/16 in N/A .25 in
    N/A Tube to CPI™ N/A 1/4 in N/A 3/8 in N/A 1.63 in N/A .76 in N/A .63 in N/A 5/8 in N/A .19 in
    N/A Tube to CPI™ N/A 3/8 in N/A 3/8 in N/A 1.70 in N/A .76 in N/A .69 in N/A 5/8 in N/A .28 in
    N/A Tube to CPI™ N/A 1/2 in N/A 3/8 in N/A 1.91 in N/A .76 in N/A .91 in N/A 5/8 in N/A .28 in
    N/A Tube to CPI™ N/A 5/8 in N/A 3/8 in N/A 1.98 in N/A .76 in N/A .97 in N/A 11/16 in N/A .28 in
    1 - 25 of 78 | Results Per Page | View | Unit of Measure
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