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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.
  • C dimension is typical finger-tight.
    • NPT Male 45° Elbow for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    NPT Pipe Thread

    C

    L

    P

    R

    W HEX

    1-1 VBZ N/A CPI™ to NPT N/A 1/16 N/A .43 in N/A .47 in N/A .57 in N/A .38 in N/A 7/16 in
    2-2 VBZ N/A CPI™ to NPT N/A 1/8 N/A .60 in N/A .53 in N/A .57 in N/A .38 in N/A 7/16 in
    3-2 VBZ N/A CPI™ to NPT N/A 1/8 N/A .64 in N/A .56 in N/A .58 in N/A .38 in N/A 7/16 in
    4-2 VBZ N/A CPI™ to NPT N/A 1/8 N/A .70 in N/A .66 in N/A .66 in N/A .38 in N/A 9/16 in
    4-4 VBZ N/A CPI™ to NPT N/A 1/4 N/A .70 in N/A .66 in N/A .86 in N/A .56 in N/A 9/16 in
    5-2 VBZ N/A CPI™ to NPT N/A 1/8 N/A .73 in N/A .66 in N/A .66 in N/A .38 in N/A 9/16 in
    6-2 VBZ N/A CPI™ to NPT N/A 1/8 N/A .76 in N/A .72 in N/A .67 in N/A .38 in N/A 9/16 in
    6-4 VBZ N/A CPI™ to NPT N/A 1/4 N/A .76 in N/A .72 in N/A .86 in N/A .56 in N/A 9/16 in
    6-6 VBZ N/A CPI™ to NPT N/A 3/8 N/A .76 in N/A .75 in N/A .95 in N/A .56 in N/A 3/4 in
    8-6 VBZ N/A CPI™ to NPT N/A 3/8 N/A .87 in N/A .75 in N/A .95 in N/A .56 in N/A 3/4 in
    10-8 VBZ N/A CPI™ to NPT N/A 1/2 N/A .87 in N/A .84 in N/A 1.20 in N/A .76 in N/A 1 1/16 in
    12-12 VBZ N/A CPI™ to NPT N/A 3/4 N/A .87 in N/A .84 in N/A 1.20 in N/A .75 in N/A 1 1/16 in
    14-12 VBZ N/A CPI™ to NPT N/A 3/4 N/A .87 in N/A 1.36 in N/A 1.27 in N/A .75 in N/A 1 5/16 in
    16-16 VBZ N/A CPI™ to NPT N/A 1 N/A 1.05 in N/A 1.19 in N/A 1.48 in N/A .94 in N/A 1 5/16 in
    1MVEL1N N/A A-LOK® to NPT N/A 1/16 N/A .43 in N/A .47 in N/A .57 in N/A .38 in N/A 7/16 in
    2MVEL2N N/A A-LOK® to NPT N/A 1/8 N/A .60 in N/A .53 in N/A .57 in N/A .38 in N/A 7/16 in
    3MVEL2N N/A A-LOK® to NPT N/A 1/8 N/A .64 in N/A .56 in N/A .58 in N/A .38 in N/A 7/16 in
    4MVEL2N N/A A-LOK® to NPT N/A 1/8 N/A .70 in N/A .66 in N/A .66 in N/A .38 in N/A 9/16 in
    4MVEL4N N/A A-LOK® to NPT N/A 1/4 N/A .70 in N/A .66 in N/A .86 in N/A .56 in N/A 9/16 in
    5MVEL2N N/A A-LOK® to NPT N/A 1/8 N/A .73 in N/A .66 in N/A .66 in N/A .38 in N/A 9/16 in
    6MVEL2N N/A A-LOK® to NPT N/A 1/8 N/A .76 in N/A .72 in N/A .67 in N/A .38 in N/A 9/16 in
    6MVEL4N N/A A-LOK® to NPT N/A 1/4 N/A .76 in N/A .72 in N/A .86 in N/A .56 in N/A 9/16 in
    6MVEL6N N/A A-LOK® to NPT N/A 3/8 N/A .76 in N/A .75 in N/A .95 in N/A .56 in N/A 3/4 in
    8MVEL6N N/A A-LOK® to NPT N/A 3/8 N/A .87 in N/A .75 in N/A .95 in N/A .56 in N/A 3/4 in
    10MVEL8N N/A A-LOK® to NPT N/A 1/2 N/A .87 in N/A .84 in N/A 1.20 in N/A .76 in N/A 1 1/16 in
    Unit of Measure
    1 2