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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 Branch Tee for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    NPT Pipe Thread

    A

    C

    H

    L

    W HEX

    2-2-2 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/8 N/A 1.92 in N/A .96 in N/A .75 in N/A .70 in N/A 1/2 in
    3-3-2 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/8 N/A 2.00 in N/A 1.00 in N/A .75 in N/A .74 in N/A 1/2 in
    4-4-2 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/8 N/A 2.12 in N/A 1.06 in N/A .75 in N/A .77 in N/A 1/2 in
    4-4-4 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/4 N/A 2.34 in N/A 1.17 in N/A .88 in N/A .88 in N/A 11/16 in
    5-5-2 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/8 N/A 2.34 in N/A 1.17 in N/A .75 in N/A .88 in N/A 5/8 in
    6-6-4 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/4 N/A 2.46 in N/A 1.23 in N/A .88 in N/A .94 in N/A 11/16 in
    8-8-4 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/4 N/A 2.84 in N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8-8-6 OBZ N/A CPI™ x CPI™ x FNPT N/A 3/8 N/A 2.84 in N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8-8-8 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/2 N/A 3.06 in N/A 1.53 in N/A 1.13 in N/A 1.13 in N/A 1 in
    10-10-8 OBZ N/A CPI™ x CPI™ x FNPT N/A 1/2 N/A 3.06 in N/A 1.53 in N/A 1.13 in N/A 1.13 in N/A 1 in
    12-12-12 OBZ N/A CPI™ x CPI™ x FNPT N/A 3/4 N/A 3.52 in N/A 1.76 in N/A 1.25 in N/A 1.36 in N/A 1 3/8 in
    14-14-12 OBZ N/A CPI™ x CPI™ x FNPT N/A 3/4 N/A 3.52 in N/A 1.76 in N/A 1.25 in N/A 1.36 in N/A 1 3/8 in
    16-16-12 OBZ N/A CPI™ x CPI™ x FNPT N/A 3/4 N/A 3.88 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 OBZ N/A CPI™ x CPI™ x FNPT N/A 1 N/A 4.28 in N/A 2.14 in N/A 1.50 in N/A 1.65 in N/A 1 5/8 in
    2FBT2N N/A A-LOK® x A-LOK®x FNPT N/A 1/8 N/A 1.92 in N/A .96 in N/A .75 in N/A .70 in N/A 1/2 in
    3FBT2N N/A A-LOK® x A-LOK®x FNPT N/A 1/8 N/A 2.00 in N/A 1.00 in N/A .75 in N/A .74 in N/A 1/2 in
    4FBT2N N/A A-LOK® x A-LOK®x FNPT N/A 1/8 N/A 2.12 in N/A 1.06 in N/A .75 in N/A .77 in N/A 1/2 in
    4FBT4N N/A A-LOK® x A-LOK®x FNPT N/A 1/4 N/A 2.34 in N/A 1.17 in N/A .88 in N/A .88 in N/A 11/16 in
    5FBT2N N/A A-LOK® x A-LOK®x FNPT N/A 1/8 N/A 2.34 in N/A 1.17 in N/A .75 in N/A .88 in N/A 5/8 in
    6FBT4N N/A A-LOK® x A-LOK®x FNPT N/A 1/4 N/A 2.46 in N/A 1.23 in N/A .88 in N/A .94 in N/A 11/16 in
    8FBT4N N/A A-LOK® x A-LOK®x FNPT N/A 1/4 N/A 2.84 in N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8FBT6N N/A A-LOK® x A-LOK®x FNPT N/A 3/8 N/A 2.84 in N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8FBT8N N/A A-LOK® x A-LOK®x FNPT N/A 1/2 N/A 3.06 in N/A 1.53 in N/A 1.13 in N/A 1.13 in N/A 1 in
    10FBT8N N/A A-LOK® x A-LOK®x FNPT N/A 1/2 N/A 3.06 in N/A 1.53 in N/A 1.13 in N/A 1.13 in N/A 1 in
    12FBT12N N/A A-LOK® x A-LOK®x FNPT N/A 3/4 N/A 3.52 in N/A 1.76 in N/A 1.25 in N/A 1.36 in N/A 1 3/8 in
    Unit of Measure
    1 2