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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. (Size 1, 2, and 3 not grooved). Generic (non-grooved 4-16) can be ordered through Quick Response Department.
  • The machined ferrule end (T2) requires only 1/4 turn from finger tight to assemble.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
  • Port Connector for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    TUBE O.D. T1

    TUBE O.D. T2

    A

    K

    Bore

    4PC8 N/A Tube for A-LOK® N/A 1/4 in N/A 1/2 in N/A 1.36 in N/A .64 in N/A .16 in
    6PC6 N/A Tube for A-LOK® N/A 3/8 in N/A 3/8 in N/A 1.16 in N/A .84 in N/A .28 in
    6PC8 N/A Tube for A-LOK® N/A 3/8 in N/A 1/2 in N/A 1.40 in N/A .72 in N/A .28 in
    8PC8 N/A Tube for A-LOK® N/A 1/2 in N/A 1/2 in N/A 1.59 in N/A 1.11 in N/A .38 in
    8PC12 N/A Tube for A-LOK® N/A 1/2 in N/A 3/4 in N/A 1.72 in N/A .91 in N/A .38 in
    12PC12 N/A Tube for A-LOK® N/A 3/4 in N/A 3/4 in N/A 1.65 in N/A 1.16 in N/A .58 in
    16PC16 N/A Tube for A-LOK® N/A 1 in N/A 1 in N/A 2.12 in N/A 1.44 in N/A .81 in
    Unit of Measure
    1 2