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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.
  • For bulkhead hole drill size and maximum bulkhead thickness, see page 32, Part BC..
    • NPT Female Bulkhead Connector for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    NPT Pipe Thread

    A

    C

    L

    W HEX

    2-2 GH2BZ N/A CPI™ to FNPT N/A 1/8 N/A 1.76 in N/A 1.23 in N/A .97 in N/A 9/16 in
    3-2 GH2BZ N/A CPI™ to FNPT N/A 1/8 N/A 1.79 in N/A 1.26 in N/A 1.00 in N/A 9/16 in
    4-2 GH2BZ N/A CPI™ to FNPT N/A 1/8 N/A 1.85 in N/A 1.31 in N/A 1.02 in N/A 5/8 in
    4-4 GH2BZ N/A CPI™ to FNPT N/A 1/4 N/A 2.04 in N/A 1.31 in N/A 1.02 in N/A 3/4 in
    5-2 GH2BZ N/A CPI™ to FNPT N/A 1/8 N/A 1.96 in N/A 1.42 in N/A 1.12 in N/A 11/16 in
    5-8 GH2BZ N/A CPI™ to FNPT N/A 1/2 N/A 2.38 in N/A 1.42 in N/A 1.12 in N/A 1 1/16 in
    6-4 GH2BZ N/A CPI™ to FNPT N/A 1/4 N/A 2.17 in N/A 1.44 in N/A 1.15 in N/A 3/4 in
    8-6 GH2BZ N/A CPI™ to FNPT N/A 3/8 N/A 2.43 in N/A 1.65 in N/A 1.25 in N/A 15/16 in
    8-8 GH2BZ N/A CPI™ to FNPT N/A 1/2 N/A 2.62 in N/A 1.65 in N/A 1.25 in N/A 1 1/16 in
    10-8 GH2BZ N/A CPI™ to FNPT N/A 1/2 N/A 2.65 in N/A 1.68 in N/A 1.28 in N/A 1 1/16 in
    12-12 GH2BZ N/A CPI™ to FNPT N/A 3/4 N/A 2.90 in N/A 1.87 in N/A 1.47 in N/A 1 3/8 in
    14-12 GH2BZ N/A CPI™ to FNPT N/A 3/4 N/A 3.18 in N/A 2.09 in N/A 1.69 in N/A 1 3/8 in
    16-16 GH2BZ N/A CPI™ to FNPT N/A 1 N/A 3.68 in N/A 2.27 in N/A 1.78 in N/A 1 3/8 in
    2FBC2N N/A A-LOK® to FNPT N/A 1/8 N/A 1.76 in N/A 1.23 in N/A .97 in N/A 9/16 in
    3FBC2N N/A A-LOK® to FNPT N/A 1/8 N/A 1.79 in N/A 1.26 in N/A 1.00 in N/A 9/16 in
    4FBC2N N/A A-LOK® to FNPT N/A 1/8 N/A 1.85 in N/A 1.31 in N/A 1.02 in N/A 5/8 in
    4FBC4N N/A A-LOK® to FNPT N/A 1/4 N/A 2.04 in N/A 1.31 in N/A 1.02 in N/A 3/4 in
    5FBC2N N/A A-LOK® to FNPT N/A 1/8 N/A 1.96 in N/A 1.42 in N/A 1.12 in N/A 11/16 in
    5FBC8N N/A A-LOK® to FNPT N/A 1/2 N/A 2.38 in N/A 1.42 in N/A 1.12 in N/A 1 1/16 in
    6FBC4N N/A A-LOK® to FNPT N/A 1/4 N/A 2.17 in N/A 1.44 in N/A 1.15 in N/A 3/4 in
    8FBC6N N/A A-LOK® to FNPT N/A 3/8 N/A 2.43 in N/A 1.65 in N/A 1.25 in N/A 15/16 in
    8FBC8N N/A A-LOK® to FNPT N/A 1/2 N/A 2.62 in N/A 1.65 in N/A 1.25 in N/A 1 1/16 in
    10FBC8N N/A A-LOK® to FNPT N/A 1/2 N/A 2.65 in N/A 1.68 in N/A 1.28 in N/A 1 1/16 in
    12FBC12N N/A A-LOK® to FNPT N/A 3/4 N/A 2.90 in N/A 1.87 in N/A 1.47 in N/A 1 3/8 in
    14FBC12N N/A A-LOK® to FNPT N/A 3/4 N/A 3.18 in N/A 2.09 in N/A 1.69 in N/A 1 3/8 in
    Unit of Measure
    1 2