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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.
    • NPT Male Branch Tee for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    NPT Pipe Thread

    A

    C

    H

    L

    R

    W HEX

    2-2-2 SBZ N/A CPI™ x CPI™ x NPT N/A 1/8 N/A 1.84 in N/A .92 in N/A .70 in N/A .66 in N/A .38 in N/A 7/16 in
    2-2-4 SBZ N/A CPI™ x CPI™ x NPT N/A 1/4 N/A 1.92 in N/A .96 in N/A .93 in N/A .70 in N/A .53 in N/A 1/2 in
    3-3-2 SBZ N/A CPI™ x CPI™ x NPT N/A 1/8 N/A 2.00 in N/A 1.00 in N/A .74 in N/A .74 in N/A .38 in N/A 1/2 in
    4-4-2 SBZ N/A CPI™ x CPI™ x NPT N/A 1/8 N/A 2.12 in N/A 1.06 in N/A .74 in N/A .77 in N/A .38 in N/A 1/2 in
    4-4-4 SBZ N/A CPI™ x CPI™ x NPT N/A 1/4 N/A 2.12 in N/A 1.06 in N/A .93 in N/A .77 in N/A .53 in N/A 1/2 in
    5-5-2 SBZ N/A CPI™ x CPI™ x NPT N/A 1/8 N/A 2.34 in N/A 1.17 in N/A .82 in N/A .88 in N/A .38 in N/A 5/8 in
    5-5-4 SBZ N/A CPI™ x CPI™ x NPT N/A 1/4 N/A 2.34 in N/A 1.17 in N/A 1.01 in N/A .88 in N/A .57 in N/A 5/8 in
    6-6-4 SBZ N/A CPI™ x CPI™ x NPT N/A 1/4 N/A 2.40 in N/A 1.20 in N/A 1.01 in N/A .91 in N/A .57 in N/A 5/8 in
    6-6-6 SBZ N/A CPI™ x CPI™ x NPT N/A 3/8 N/A 2.62 in N/A 1.31 in N/A 1.12 in N/A 1.02 in N/A .57 in N/A 13/16 in
    8-8-6 SBZ N/A CPI™ x CPI™ x NPT N/A 3/8 N/A 2.84 in N/A 1.42 in N/A 1.12 in N/A 1.02 in N/A .57 in N/A 13/16 in
    8-8-8 SBZ N/A CPI™ x CPI™ x NPT N/A 1/2 N/A 2.84 in N/A 1.42 in N/A 1.31 in N/A 1.02 in N/A .75 in N/A 13/16 in
    10-10-8 SBZ N/A CPI™ x CPI™ x NPT N/A 1/2 N/A 3.06 in N/A 1.53 in N/A 1.42 in N/A 1.13 in N/A .75 in N/A 1 in
    12-12-12 SBZ N/A CPI™ x CPI™ x NPT N/A 3/4 N/A 3.14 in 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
    14-14-12 SBZ N/A CPI™ x CPI™ x NPT N/A 3/4 N/A 3.52 in N/A 1.76 in N/A 1.65 in N/A 1.36 in N/A .76 in N/A 1 3/8 in
    16-16-12 SBZ N/A CPI™ x CPI™ x NPT N/A 3/4 N/A 3.88 in N/A 1.94 in N/A 1.65 in N/A 1.45 in N/A .76 in N/A 1 3/8 in
    16-16-16 SBZ N/A CPI™ x CPI™ x NPT N/A 1 N/A 3.88 in N/A 1.94 in N/A 1.84 in N/A 1.45 in N/A .95 in N/A 1 3/8 in
    2MBT2N N/A A-LOK® x A-LOK® x NPT N/A 1/8 N/A 1.84 in N/A .92 in N/A .70 in N/A .66 in N/A .38 in N/A 7/16 in
    2MBT4N N/A A-LOK® x A-LOK® x NPT N/A 1/4 N/A 1.92 in N/A .96 in N/A .93 in N/A .70 in N/A .53 in N/A 1/2 in
    3MBT2N N/A A-LOK® x A-LOK® x NPT N/A 1/8 N/A 2.00 in N/A 1.00 in N/A .74 in N/A .74 in N/A .38 in N/A 1/2 in
    4MBT2N N/A A-LOK® x A-LOK® x NPT N/A 1/8 N/A 2.12 in N/A 1.06 in N/A .74 in N/A .77 in N/A .38 in N/A 1/2 in
    4MBT4N N/A A-LOK® x A-LOK® x NPT N/A 1/4 N/A 2.12 in N/A 1.06 in N/A .93 in N/A .77 in N/A .53 in N/A 1/2 in
    5MBT2N N/A A-LOK® x A-LOK® x NPT N/A 1/8 N/A 2.34 in N/A 1.17 in N/A .82 in N/A .88 in N/A .38 in N/A 5/8 in
    5MBT4N N/A A-LOK® x A-LOK® x NPT N/A 1/4 N/A 2.34 in N/A 1.17 in N/A 1.01 in N/A .88 in N/A .57 in N/A 5/8 in
    6MBT4N N/A A-LOK® x A-LOK® x NPT N/A 1/4 N/A 2.40 in N/A 1.20 in N/A 1.01 in N/A .91 in N/A .57 in N/A 5/8 in
    6MBT6N N/A A-LOK® x A-LOK® x NPT N/A 3/8 N/A 2.62 in N/A 1.31 in N/A 1.12 in N/A 1.02 in N/A .57 in N/A 13/16 in
    Unit of Measure
    1 2