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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.
    • BSP Taper Male Connector for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    BSPT Thread

    A

    C

    R

    W HEX

    Bore

    2-2K FBZ N/A CPI™ to BSPT N/A 1/8 N/A 1.20 in N/A .60 in N/A .38 in N/A 7/16 in N/A .19 in
    2-4K FBZ N/A CPI™ to BSPT N/A 1/4 N/A 1.40 in N/A .60 in N/A .56 in N/A 9/16 in N/A .19 in
    4-2K FBZ N/A CPI™ to BSPT N/A 1/8 N/A 1.30 in N/A .70 in N/A .38 in N/A 1/2 in N/A .19 in
    4-4K FBZ N/A CPI™ to BSPT N/A 1/4 N/A 1.50 in N/A .70 in N/A .56 in N/A 9/16 in N/A .19 in
    4-6K FBZ N/A CPI™ to BSPT N/A 3/8 N/A 1.52 in N/A .70 in N/A .56 in N/A 11/16 in N/A .19 in
    4-8K FBZ N/A CPI™ to BSPT N/A 1/2 N/A 1.77 in N/A .70 in N/A .75 in N/A 7/8 in N/A .19 in
    5-2K FBZ N/A CPI™ to BSPT N/A 1/8 N/A 1.34 in N/A .73 in N/A .38 in N/A 9/16 in N/A .19 in
    5-4K FBZ N/A CPI™ to BSPT N/A 1/4 N/A 1.52 in N/A .73 in N/A .56 in N/A 9/16 in N/A .19 in
    6-2K FBZ N/A CPI™ to BSPT N/A 1/8 N/A 1.39 in N/A .76 in N/A .38 in N/A 5/8 in N/A .19 in
    6-4K FBZ N/A CPI™ to BSPT N/A 1/4 N/A 1.57 in N/A .76 in N/A .56 in N/A 5/8 in N/A .28 in
    6-6K FBZ N/A CPI™ to BSPT N/A 3/8 N/A 1.57 in N/A .76 in N/A .56 in N/A 11/16 in N/A .28 in
    6-8K FBZ N/A CPI™ to BSPT N/A 1/2 N/A 1.82 in N/A .76 in N/A .75 in N/A 7/8 in N/A .28 in
    8-4K FBZ N/A CPI™ to BSPT N/A 1/4 N/A 1.69 in N/A .87 in N/A .56 in N/A 13/16 in N/A .28 in
    8-6K FBZ N/A CPI™ to BSPT N/A 3/8 N/A 1.69 in N/A .87 in N/A .56 in N/A 13/16 in N/A .38 in
    8-8K FBZ N/A CPI™ to BSPT N/A 1/2 N/A 1.91 in N/A .87 in N/A .75 in N/A 7/8 in N/A .41 in
    2MSC2K N/A A-LOK® to BSPT N/A 1/8 N/A 1.20 in N/A .60 in N/A .38 in N/A 7/16 in N/A .19 in
    2MSC4K N/A A-LOK® to BSPT N/A 1/4 N/A 1.40 in N/A .60 in N/A .56 in N/A 9/16 in N/A .19 in
    4MSC2K N/A A-LOK® to BSPT N/A 1/8 N/A 1.30 in N/A .70 in N/A .38 in N/A 1/2 in N/A .19 in
    4MSC4K N/A A-LOK® to BSPT N/A 1/4 N/A 1.50 in N/A .70 in N/A .56 in N/A 9/16 in N/A .19 in
    4MSC6K N/A A-LOK® to BSPT N/A 3/8 N/A 1.52 in N/A .70 in N/A .56 in N/A 11/16 in N/A .19 in
    4MSC8K N/A A-LOK® to BSPT N/A 1/2 N/A 1.77 in N/A .70 in N/A .75 in N/A 7/8 in N/A .19 in
    5MSC2K N/A A-LOK® to BSPT N/A 1/8 N/A 1.34 in N/A .73 in N/A .38 in N/A 9/16 in N/A .19 in
    5MSC4K N/A A-LOK® to BSPT N/A 1/4 N/A 1.52 in N/A .73 in N/A .56 in N/A 9/16 in N/A .19 in
    6MSC2K N/A A-LOK® to BSPT N/A 1/8 N/A 1.39 in N/A .76 in N/A .38 in N/A 5/8 in N/A .19 in
    6MSC4K N/A A-LOK® to BSPT N/A 1/4 N/A 1.57 in N/A .76 in N/A .56 in N/A 5/8 in N/A .28 in
    Unit of Measure
    1 2