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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 Female Run Tee for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    NPT Pipe Thread

    A

    C

    H

    L

    W HEX

    2-2-2 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/8 N/A 1.71 in N/A .96 in N/A .75 in N/A .70 in N/A 1/2 in
    3-2-3 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/8 N/A 1.75 in N/A 1.00 in N/A .75 in N/A .74 in N/A 1/2 in
    4-2-4 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/8 N/A 1.81 in N/A 1.06 in N/A .75 in N/A .77 in N/A 1/2 in
    4-4-4 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/4 N/A 2.05 in N/A 1.17 in N/A .88 in N/A .88 in N/A 11/16 in
    5-2-5 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/8 N/A 1.92 in N/A 1.17 in N/A .75 in N/A .88 in N/A 5/8 in
    6-4-6 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/4 N/A 2.11 in N/A 1.23 in N/A .88 in N/A .94 in N/A 11/16 in
    8-4-8 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/4 N/A 2.30 in N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8-6-8 MBZ N/A CPI™ x FNPT x CPI™ N/A 3/8 N/A 2.30 in N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8-8-8 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/2 N/A 2.66 in N/A 1.53 in N/A 1.13 in N/A 1.13 in N/A 1 in
    10-8-10 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/2 N/A 2.70 in N/A 1.57 in N/A 1.13 in N/A 1.17 in N/A 1 1/16 in
    12-12-12 MBZ N/A CPI™ x FNPT x CPI™ N/A 3/4 N/A 3.01 in N/A 1.76 in N/A 1.25 in N/A 1.36 in N/A 1 3/8 in
    14-8-14 MBZ N/A CPI™ x FNPT x CPI™ N/A 1/2 N/A 3.01 in N/A 1.76 in N/A 1.25 in N/A 1.36 in N/A 1 3/8 in
    14-12-14 MBZ N/A CPI™ x FNPT x CPI™ N/A 3/4 N/A 3.01 in N/A 1.76 in N/A 1.25 in N/A 1.36 in N/A 1 3/8 in
    16-12-16 MBZ N/A CPI™ x FNPT x CPI™ N/A 3/4 N/A 3.19 in N/A 1.94 in N/A 1.25 in N/A 1.45 in N/A 1 3/8 in
    16-16-16 MBZ N/A CPI™ x FNPT x CPI™ N/A 1 N/A 3.64 in N/A 2.14 in N/A 1.50 in N/A 1.65 in N/A 1 5/8 in
    2FRT2N N/A A-LOK® x FNPT x A-LOK® N/A 1/8 N/A 1.71 in N/A .96 in N/A .75 in N/A .70 in N/A 1/2 in
    3FRT2N N/A A-LOK® x FNPT x A-LOK® N/A 1/8 N/A 1.75 in N/A 1.00 in N/A .75 in N/A .74 in N/A 1/2 in
    4FRT2N N/A A-LOK® x FNPT x A-LOK® N/A 1/8 N/A 1.81 in N/A 1.06 in N/A .75 in N/A .77 in N/A 1/2 in
    4FRT4N N/A A-LOK® x FNPT x A-LOK® N/A 1/4 N/A 2.05 in N/A 1.17 in N/A .88 in N/A .88 in N/A 11/16 in
    5FRT2N N/A A-LOK® x FNPT x A-LOK® N/A 1/8 N/A 1.92 in N/A 1.17 in N/A .75 in N/A .88 in N/A 5/8 in
    6FRT4N N/A A-LOK® x FNPT x A-LOK® N/A 1/4 N/A 2.11 in N/A 1.23 in N/A .88 in N/A .94 in N/A 11/16 in
    8FRT4N N/A A-LOK® x FNPT x A-LOK® N/A 1/4 N/A 2.30 in N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8FRT6N N/A A-LOK® x FNPT x A-LOK® N/A 3/8 N/A 2.30 in N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8FRT8N N/A A-LOK® x FNPT x A-LOK® N/A 1/2 N/A 2.66 in N/A 1.53 in N/A 1.13 in N/A 1.13 in N/A 1 in
    10FRT8N N/A A-LOK® x FNPT x A-LOK® N/A 1/2 N/A 2.70 in N/A 1.57 in N/A 1.13 in N/A 1.17 in N/A 1 1/16 in
    Unit of Measure
    1 2