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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.
  • Tube stub is pre-grooved as standard.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
    • BSP Taper Female Adapter for fractional tube
    Unit of Measure
    1 

    Item #

    Connection Type

    Tube O.D.

    BSPT Thread

    A

    K

    W HEX

    Bore

    4-2K T2HG N/A Tube to FBSPT N/A 1/4 in N/A 1/8-28 N/A 1.31 in N/A .64 in N/A 9/16 in N/A .16 in
    4-4K T2HG N/A Tube to FBSPT N/A 1/4 in N/A 1/4-19 N/A 1.48 in N/A .64 in N/A 3/4 in N/A .16 in
    6-4K T2HG N/A Tube to FBSPT N/A 3/8 in N/A 1/4-19 N/A 1.56 in N/A .72 in N/A 3/4 in N/A .28 in
    6-6K T2HG N/A Tube to FBSPT N/A 3/8 in N/A 3/8-19 N/A 1.63 in N/A .72 in N/A 7/8 in N/A .28 in
    8-4K T2HG N/A Tube to FBSPT N/A 1/2 in N/A 1/4-19 N/A 1.83 in N/A .98 in N/A 3/4 in N/A .38 in
    8-6K T2HG N/A Tube to FBSPT N/A 1/2 in N/A 3/8-19 N/A 1.89 in N/A .98 in N/A 7/8 in N/A .38 in
    8-8K T2HG N/A Tube to FBSPT N/A 1/2 in N/A 1/2-14 N/A 2.14 in N/A .98 in N/A 1 1/16 in N/A .38 in
    4FA2K N/A Tube to FBSPT N/A 1/4 in N/A 1/8-28 N/A 1.31 in N/A .64 in N/A 9/16 in N/A .16 in
    4FA4K N/A Tube to FBSPT N/A 1/4 in N/A 1/4-19 N/A 1.48 in N/A .64 in N/A 3/4 in N/A .16 in
    6FA4K N/A Tube to FBSPT N/A 3/8 in N/A 1/4-19 N/A 1.56 in N/A .72 in N/A 3/4 in N/A .28 in
    6FA6K N/A Tube to FBSPT N/A 3/8 in N/A 3/8-19 N/A 1.63 in N/A .72 in N/A 7/8 in N/A .28 in
    8FA4K N/A Tube to FBSPT N/A 1/2 in N/A 1/4-19 N/A 1.83 in N/A .98 in N/A 3/4 in N/A .38 in
    8FA6K N/A Tube to FBSPT N/A 1/2 in N/A 3/8-19 N/A 1.89 in N/A .98 in N/A 7/8 in N/A .38 in
    8FA8K N/A Tube to FBSPT N/A 1/2 in N/A 1/2-14 N/A 2.14 in N/A .98 in N/A 1 1/16 in N/A .38 in
    Unit of Measure
    1