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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.
    • NPT Female Elbow for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    NPT Pipe Thread

    C

    H

    L

    W HEX

    1FEL1N N/A A-LOK® to FNPT N/A 1/16 N/A .75 in N/A .50 in N/A .60 in N/A 7/16 in
    1FEL2N N/A A-LOK® to FNPT N/A 1/8 N/A .79 in N/A .75 in N/A .64 in N/A 9/16 in
    2FEL2N N/A A-LOK® to FNPT N/A 1/8 N/A .97 in N/A .75 in N/A .71 in N/A 9/16 in
    2FEL4N N/A A-LOK® to FNPT N/A 1/4 N/A 1.10 in N/A .88 in N/A .84 in N/A 3/4 in
    3FEL2N N/A A-LOK® to FNPT N/A 1/8 N/A 1.00 in N/A .75 in N/A .74 in N/A 9/16 in
    4FEL2N N/A A-LOK® to FNPT N/A 1/8 N/A 1.06 in N/A .75 in N/A .77 in N/A 9/16 in
    4FEL4N N/A A-LOK® to FNPT N/A 1/4 N/A 1.20 in N/A .88 in N/A .91 in N/A 11/16 in
    4FEL6N N/A A-LOK® to FNPT N/A 3/8 N/A 1.25 in N/A .88 in N/A .96 in N/A 13/16 in
    4FEL8N N/A A-LOK® to FNPT N/A 1/2 N/A 1.36 in N/A 1.13 in N/A 1.07 in N/A 1 in
    5FEL2N N/A A-LOK® to FNPT N/A 1/8 N/A 1.13 in N/A .75 in N/A .84 in N/A 9/16 in
    5FEL4N N/A A-LOK® to FNPT N/A 1/4 N/A 1.24 in N/A .88 in N/A .94 in N/A 11/16 in
    6FEL2N N/A A-LOK® to FNPT N/A 1/8 N/A 1.20 in N/A .75 in N/A .91 in N/A 5/8 in
    6FEL4N N/A A-LOK® to FNPT N/A 1/4 N/A 1.26 in N/A .88 in N/A .97 in N/A 11/16 in
    6FEL6N N/A A-LOK® to FNPT N/A 3/8 N/A 1.31 in N/A .88 in N/A 1.02 in N/A 13/16 in
    6FEL8N N/A A-LOK® to FNPT N/A 1/2 N/A 1.42 in N/A 1.13 in N/A 1.13 in N/A 1 in
    8FEL4N N/A A-LOK® to FNPT N/A 1/4 N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8FEL6N N/A A-LOK® to FNPT N/A 3/8 N/A 1.42 in N/A .88 in N/A 1.02 in N/A 13/16 in
    8FEL8N N/A A-LOK® to FNPT N/A 1/2 N/A 1.53 in N/A 1.13 in N/A 1.13 in N/A 1 in
    10FEL6N N/A A-LOK® to FNPT N/A 3/8 N/A 1.50 in N/A .88 in N/A 1.10 in N/A 15/16 in
    10FEL8N N/A A-LOK® to FNPT N/A 1/2 N/A 1.57 in N/A 1.13 in N/A 1.17 in N/A 1 1/16 in
    12FEL8N N/A A-LOK® to FNPT N/A 1/2 N/A 1.57 in N/A 1.13 in N/A 1.17 in N/A 1 1/16 in
    12FEL12N N/A A-LOK® to FNPT N/A 3/4 N/A 1.76 in N/A 1.25 in N/A 1.36 in N/A 1 3/8 in
    14FEL12N N/A A-LOK® to FNPT N/A 3/4 N/A 1.76 in N/A 1.25 in N/A 1.36 in N/A 1 3/8 in
    16FEL12N N/A A-LOK® to FNPT N/A 3/4 N/A 1.93 in N/A 1.25 in N/A 1.45 in N/A 1 3/8 in
    16FEL16N N/A A-LOK® to FNPT N/A 1 N/A 2.02 in N/A 1.50 in N/A 1.53 in N/A 1 5/8 in
    Unit of Measure
    1 2