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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.
  • Copper washer must be used for this design.
  • Tube stub is pre-grooved as standard.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
  • BSPP Female Adapter for fractional tube
    Unit of Measure
    1 

    Item #

    Connection Type

    Tube O.D.

    BSPP Thread

    A

    K

    W HEX

    Bore

    2-2R T2HG N/A Tube to FBSPP N/A 1/8 in N/A 1/8-28 N/A 1.21 in N/A .53 in N/A 9/16 in N/A .05 in
    4-2R T2HG N/A Tube to FBSPP N/A 1/4 in N/A 1/4 N/A 1.31 in N/A .63 in N/A 9/16 in N/A .18 in
    4-4R T2HG N/A Tube to FBSPP N/A 1/4 in N/A 1/4 N/A 1.68 in N/A .63 in N/A 3/4 in N/A .18 in
    6-4R T2HG N/A Tube to FBSPP N/A 3/8 in N/A 3/8 N/A 1.56 in N/A .69 in N/A 3/4 in N/A .28 in
    6-6R T2HG N/A Tube to FBSPP N/A 3/8 in N/A 3/8 N/A 1.53 in N/A .69 in N/A 7/8 in N/A .28 in
    8-6R T2HG N/A Tube to FBSPP N/A 1/2 in N/A 1/2 N/A 1.89 in N/A .91 in N/A 7/8 in N/A .39 in
    8-8R T2HG N/A Tube to FBSPP N/A 1/2 in N/A 1/2 N/A 1.91 in N/A .91 in N/A 1 1/16 in N/A .39 in
    2FA2R N/A Tube to FBSPP N/A 1/8 in N/A 1/8-28 N/A 1.21 in N/A .53 in N/A 9/16 in N/A .05 in
    4FA2R N/A Tube to FBSPP N/A 1/4 in N/A 1/4 N/A 1.31 in N/A .63 in N/A 9/16 in N/A .18 in
    4FA4R N/A Tube to FBSPP N/A 1/4 in N/A 1/4 N/A 1.68 in N/A .63 in N/A 3/4 in N/A .18 in
    6FA4R N/A Tube to FBSPP N/A 3/8 in N/A 3/8 N/A 1.56 in N/A .69 in N/A 3/4 in N/A .28 in
    6FA6R N/A Tube to FBSPP N/A 3/8 in N/A 3/8 N/A 1.53 in N/A .69 in N/A 7/8 in N/A .28 in
    8FA6R N/A Tube to FBSPP N/A 1/2 in N/A 1/2 N/A 1.89 in N/A .91 in N/A 7/8 in N/A .39 in
    8FA8R N/A Tube to FBSPP N/A 1/2 in N/A 1/2 N/A 1.91 in N/A .91 in N/A 1 1/16 in N/A .39 in
    Unit of Measure
    1