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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.
  • C dimension is typical finger-tight.
  • Sizes 20, 24 require additional lubrication prior to assembly.
    • NPT Male Elbow for fractional tube
    Unit of Measure
    1 2 3 

    Item #

    Connection Type

    NPT Pipe Thread

    C

    H

    L

    R

    W HEX

    10-12 CBZ N/A CPI™ to NPT N/A 3/4 N/A 1.57 in N/A 1.46 in N/A 1.17 in N/A .75 in N/A 1 1/16 in
    12-8 CBZ N/A CPI™ to NPT N/A 1/2 N/A 1.57 in N/A 1.46 in N/A 1.17 in N/A .76 in N/A 1 1/16 in
    12-12 CBZ N/A CPI™ to NPT N/A 3/4 N/A 1.57 in N/A 1.46 in N/A 1.17 in N/A .75 in N/A 1 1/16 in
    14-12 CBZ N/A CPI™ to NPT N/A 3/4 N/A 1.76 in N/A 1.65 in N/A 1.36 in N/A .75 in N/A 1 3/8 in
    16-12 CBZ N/A CPI™ to NPT N/A 3/4 N/A 1.93 in N/A 1.65 in N/A 1.45 in N/A .75 in N/A 1 3/8 in
    16-16 CBZ N/A CPI™ to NPT N/A 1 N/A 1.93 in N/A 1.84 in N/A 1.45 in N/A .94 in N/A 1 3/8 in
    20-20 CBZ N/A CPI™ to NPT N/A 1 1/4 N/A 2.61 in N/A 1.88 in N/A 1.75 in N/A .97 in N/A 1 5/8 in
    24-24 CBZ N/A CPI™ to NPT N/A 1 1/2 N/A 3.06 in N/A 2.38 in N/A 2.00 in N/A 1.00 in N/A 1 7/8 in
    32-32 CBZ N/A CPI™ to NPT N/A 2 N/A 4.22 in N/A 2.79 in N/A 2.75 in N/A 1.04 in N/A 2 13/16 in
    1MSEL1N N/A A-LOK® to NPT N/A 1/16 N/A .75 in N/A .70 in N/A .60 in N/A .38 in N/A 7/16 in
    1MSEL2N N/A A-LOK® to NPT N/A 1/8 N/A .75 in N/A .70 in N/A .60 in N/A .38 in N/A 7/16 in
    2MSEL1N N/A A-LOK® to NPT N/A 1/16 N/A .93 in N/A .70 in N/A .67 in N/A .38 in N/A 7/16 in
    2MSEL2N N/A A-LOK® to NPT N/A 1/8 N/A .93 in N/A .70 in N/A .67 in N/A .38 in N/A 7/16 in
    2MSEL4N N/A A-LOK® to NPT N/A 1/4 N/A .97 in N/A .93 in N/A .72 in N/A .56 in N/A 9/16 in
    3MSEL2N N/A A-LOK® to NPT N/A 1/8 N/A 1.00 in N/A .74 in N/A .74 in N/A .38 in N/A 1/2 in
    3MSEL4N N/A A-LOK® to NPT N/A 1/4 N/A 1.00 in N/A .93 in N/A .74 in N/A .56 in N/A 9/16 in
    4MSEL1N N/A A-LOK® to NPT N/A 1/16 N/A 1.06 in N/A .74 in N/A .77 in N/A .38 in N/A 1/2 in
    4MSEL2N N/A A-LOK® to NPT N/A 1/8 N/A 1.06 in N/A .74 in N/A .77 in N/A .38 in N/A 1/2 in
    4MSEL4N N/A A-LOK® to NPT N/A 1/4 N/A 1.06 in N/A .93 in N/A .77 in N/A .56 in N/A 9/16 in
    4MSEL6N N/A A-LOK® to NPT N/A 3/8 N/A 1.17 in N/A 1.04 in N/A .88 in N/A .56 in N/A 11/16 in
    4MSEL8N N/A A-LOK® to NPT N/A 1/2 N/A 1.25 in N/A 1.31 in N/A .96 in N/A .76 in N/A 13/16 in
    5MSEL2N N/A A-LOK® to NPT N/A 1/8 N/A 1.13 in N/A .79 in N/A .84 in N/A .38 in N/A 9/16 in
    5MSEL4N N/A A-LOK® to NPT N/A 1/4 N/A 1.13 in N/A .97 in N/A .84 in N/A .56 in N/A 9/16 in
    6MSEL2N N/A A-LOK® to NPT N/A 1/8 N/A 1.20 in N/A .82 in N/A .91 in N/A .38 in N/A 5/8 in
    6MSEL4N N/A A-LOK® to NPT N/A 1/4 N/A 1.20 in N/A 1.01 in N/A .91 in N/A .56 in N/A 5/8 in
    Unit of Measure
    1 2 3