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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.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
  • Tube stub is pre-grooved as standard.
  • Inch sizes 1, 2, and 3 and metric sizes 2, 3, and 4mm do not have grooves.
  • Sizes 20, 24, 32 require additional lubrication prior to assembly.
  • NPT Tube End Male Adapter for fractional tube
    Unit of Measure
    1 2 3 

    Item #

    Connection Type

    Tube O.D.

    NPT Pipe Thread

    A

    R

    K

    W HEX

    Bore

    12MA8N N/A Tube to NPT N/A 3/4 in N/A 1/2 N/A 2.06 in N/A .75 in N/A .97 in N/A 7/8 in N/A .47 in
    12MA12N N/A Tube to NPT N/A 3/4 in N/A 3/4 N/A 2.06 in N/A .75 in N/A .97 in N/A 1 1/16 in N/A .58 in
    12MA16N N/A Tube to NPT N/A 3/4 in N/A 1 N/A 2.41 in N/A .94 in N/A .97 in N/A 1 3/8 in N/A .58 in
    16MA12N N/A Tube to NPT N/A 1 in N/A 3/4 N/A 2.31 in N/A .75 in N/A 1.22 in N/A 1 1/16 in N/A .81 in
    16MA16N N/A Tube to NPT N/A 1 in N/A 1 N/A 2.68 in N/A .94 in N/A 1.22 in N/A 1 3/8 in N/A .81 in
    20MA20N N/A Tube to NPT N/A 1 1/4 in N/A 1 1/4 N/A 3.16 in N/A .97 in N/A 1.71 in N/A 1 3/4 in N/A 1.00 in
    24MA24N N/A Tube to NPT N/A 1 1/2 in N/A 1 1/2 N/A 3.72 in N/A 1.00 in N/A 2.05 in N/A 2 1/8 in N/A 1.25 in
    32MA32N N/A Tube to NPT N/A 2 in N/A 2 N/A 4.70 in N/A 1.04 in N/A 2.74 in N/A 2 3/4 in N/A 1.72 in
    Unit of Measure
    1 2 3