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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, C1 and C2 dimensions are typical finger-tight.
  • For reducer sizes call out short end first.
  • For replacement bulkhead nuts, see page 77, Part WLZ.
    • Bulkhead Union for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    T1 Tube O.D.

    T2 Tube O.D.

    A

    C1

    C2

    L1

    L2

    W HEX

    Bulkhead Hole Drill Size

    Maximum Bulkhead Thickness

    1-1 WBZ N/A CPI™ to CPI™ N/A 1/16 in N/A 1/16 in N/A 1.26 in N/A .44 in N/A .69 in N/A .41 in N/A .53 in N/A 5/16 in N/A 13/64 in N/A 1/8 in
    2-2 WBZ N/A CPI™ to CPI™ N/A 1/8 in N/A 1/8 in N/A 2.01 in N/A .60 in N/A 1.23 in N/A .53 in N/A .97 in N/A 1/2 in N/A 21/64 in N/A 1/2 in
    2-4 WBZ N/A CPI™ to CPI™ N/A 1/8 in N/A 1/4 in N/A 2.17 in N/A .60 in N/A 1.33 in N/A .59 in N/A 1.03 in N/A 5/8 in N/A 29/64 in N/A 17/32 in
    3-3 WBZ N/A CPI™ to CPI™ N/A 3/16 in N/A 3/16 in N/A 2.12 in N/A .64 in N/A 1.27 in N/A .59 in N/A 1.00 in N/A 9/16 in N/A 25/64 in N/A 1/2 in
    4-2 WBZ N/A CPI™ to CPI™ N/A 1/4 in N/A 1/8 in N/A 2.18 in N/A .70 in N/A 1.23 in N/A .66 in N/A .97 in N/A 1/2 in N/A 21/64 in N/A 1/2 in
    4-4 WBZ N/A CPI™ to CPI™ N/A 1/4 in N/A 1/4 in N/A 2.28 in N/A .70 in N/A 1.33 in N/A .66 in N/A 1.03 in N/A 5/8 in N/A 29/64 in N/A 17/32 in
    5-5 WBZ N/A CPI™ to CPI™ N/A 5/16 in N/A 5/16 in N/A 2.40 in N/A .73 in N/A 1.41 in N/A .69 in N/A 1.12 in N/A 11/16 in N/A 33/64 in N/A 9/16 in
    6-6 WBZ N/A CPI™ to CPI™ N/A 3/8 in N/A 3/8 in N/A 2.46 in N/A .76 in N/A 1.45 in N/A .72 in N/A 1.16 in N/A 3/4 in N/A 37/64 in N/A 9/16 in
    8-8 WBZ N/A CPI™ to CPI™ N/A 1/2 in N/A 1/2 in N/A 2.80 in N/A .87 in N/A 1.65 in N/A .75 in N/A 1.25 in N/A 15/16 in N/A 49/64 in N/A 19/32 in
    10-10 WBZ N/A CPI™ to CPI™ N/A 5/8 in N/A 5/8 in N/A 2.87 in N/A .87 in N/A 1.68 in N/A .78 in N/A 1.28 in N/A 1 1/16 in N/A 57/64 in N/A 19/32 in
    12-12 WBZ N/A CPI™ to CPI™ N/A 3/4 in N/A 3/4 in N/A 3.12 in N/A .87 in N/A 1.87 in N/A .84 in N/A 1.47 in N/A 1 3/16 in N/A 1 1/64 in N/A 25/32 in
    14-14 WBZ N/A CPI™ to CPI™ N/A 7/8 in N/A 7/8 in N/A 3.34 in N/A .87 in N/A 2.09 in N/A .84 in N/A 1.69 in N/A 1 3/8 in N/A 1 9/64 in N/A 15/16 in
    16-16 WBZ N/A CPI™ to CPI™ N/A 1 in N/A 1 in N/A 3.79 in N/A 1.05 in N/A 2.27 in N/A 1.03 in N/A 1.78 in N/A 1 5/8 in N/A 1 21/64 in N/A 15/16 in
    1BC1 N/A A-LOK® to A-LOK® N/A 1/16 in N/A 1/16 in N/A 1.26 in N/A .44 in N/A .69 in N/A .41 in N/A .53 in N/A 5/16 in N/A 13/64 in N/A 1/8 in
    2BC2 N/A A-LOK® to A-LOK® N/A 1/8 in N/A 1/8 in N/A 2.01 in N/A .60 in N/A 1.23 in N/A .53 in N/A .97 in N/A 1/2 in N/A 21/64 in N/A 1/2 in
    2BC4 N/A A-LOK® to A-LOK® N/A 1/8 in N/A 1/4 in N/A 2.17 in N/A .60 in N/A 1.33 in N/A .59 in N/A 1.03 in N/A 5/8 in N/A 29/64 in N/A 17/32 in
    3BC3 N/A A-LOK® to A-LOK® N/A 3/16 in N/A 3/16 in N/A 2.12 in N/A .64 in N/A 1.27 in N/A .59 in N/A 1.00 in N/A 9/16 in N/A 25/64 in N/A 1/2 in
    4BC2 N/A A-LOK® to A-LOK® N/A 1/4 in N/A 1/8 in N/A 2.18 in N/A .70 in N/A 1.23 in N/A .66 in N/A .97 in N/A 1/2 in N/A 21/64 in N/A 1/2 in
    4BC4 N/A A-LOK® to A-LOK® N/A 1/4 in N/A 1/4 in N/A 2.28 in N/A .70 in N/A 1.33 in N/A .66 in N/A 1.03 in N/A 5/8 in N/A 29/64 in N/A 17/32 in
    5BC5 N/A A-LOK® to A-LOK® N/A 5/16 in N/A 5/16 in N/A 2.40 in N/A .73 in N/A 1.41 in N/A .69 in N/A 1.12 in N/A 11/16 in N/A 33/64 in N/A 9/16 in
    6BC6 N/A A-LOK® to A-LOK® N/A 3/8 in N/A 3/8 in N/A 2.46 in N/A .76 in N/A 1.45 in N/A .72 in N/A 1.16 in N/A 3/4 in N/A 37/64 in N/A 9/16 in
    8BC8 N/A A-LOK® to A-LOK® N/A 1/2 in N/A 1/2 in N/A 2.80 in N/A .87 in N/A 1.65 in N/A .75 in N/A 1.25 in N/A 15/16 in N/A 49/64 in N/A 19/32 in
    10BC10 N/A A-LOK® to A-LOK® N/A 5/8 in N/A 5/8 in N/A 2.87 in N/A .87 in N/A 1.68 in N/A .78 in N/A 1.28 in N/A 1 1/16 in N/A 57/64 in N/A 19/32 in
    12BC12 N/A A-LOK® to A-LOK® N/A 3/4 in N/A 3/4 in N/A 3.12 in N/A .87 in N/A 1.87 in N/A .84 in N/A 1.47 in N/A 1 3/16 in N/A 1 1/64 in N/A 25/32 in
    14BC14 N/A A-LOK® to A-LOK® N/A 7/8 in N/A 7/8 in N/A 3.34 in N/A .87 in N/A 2.09 in N/A .84 in N/A 1.69 in N/A 1 3/8 in N/A 1 9/64 in N/A 15/16 in
    Unit of Measure
    1 2