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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 and C dimensions are typical finger-tight.
  • Sizes 20, 24, 32 require additional lubrication prior to assembly.
    • NPT Male Connector for fractional tube
    Unit of Measure
    1 2 3 4 

    Item #

    Connection Type

    NPT Pipe Thread

    A

    C

    R

    W HEX

    8MSC8N N/A A-LOK® to NPT N/A 1/2 N/A 1.93 in N/A .87 in N/A .76 in N/A 7/8 in
    8MSC12N N/A A-LOK® to NPT N/A 3/4 N/A 1.99 in N/A .87 in N/A .75 in N/A 1 1/16 in
    8MSC16N N/A A-LOK® to NPT N/A 1 N/A 2.28 in N/A .87 in N/A .94 in N/A 1 3/8 in
    10MSC6N N/A A-LOK® to NPT N/A 3/8 N/A 1.74 in N/A .87 in N/A .56 in N/A 15/16 in
    10MSC8N N/A A-LOK® to NPT N/A 1/2 N/A 1.93 in N/A .87 in N/A .76 in N/A 15/16 in
    10MSC12N N/A A-LOK® to NPT N/A 3/4 N/A 1.99 in N/A .87 in N/A .75 in N/A 1 1/16 in
    12MSC8N N/A A-LOK® to NPT N/A 1/2 N/A 1.99 in N/A .87 in N/A .76 in N/A 1 1/16 in
    12MSC12N N/A A-LOK® to NPT N/A 3/4 N/A 1.99 in N/A .87 in N/A .75 in N/A 1 1/16 in
    12MSC16N N/A A-LOK® to NPT N/A 1 N/A 2.28 in N/A .87 in N/A .94 in N/A 1 3/8 in
    14MSC12N N/A A-LOK® to NPT N/A 3/4 N/A 1.99 in N/A .87 in N/A .75 in N/A 1 3/16 in
    14MSC16N N/A A-LOK® to NPT N/A 1 N/A 2.28 in N/A .87 in N/A .94 in N/A 1 3/8 in
    16MSC8N N/A A-LOK® to NPT N/A 1/2 N/A 2.27 in N/A 1.05 in N/A .76 in N/A 1 3/8 in
    16MSC12N N/A A-LOK® to NPT N/A 3/4 N/A 2.27 in N/A 1.05 in N/A .75 in N/A 1 3/8 in
    16MSC16N N/A A-LOK® to NPT N/A 1 N/A 2.46 in N/A 1.05 in N/A .94 in N/A 1 3/8 in
    20MSC20N N/A A-LOK® to NPT N/A 1 1/4 N/A 3.03 in N/A 1.52 in N/A .97 in N/A 1 3/4 in
    24MSC24N N/A A-LOK® to NPT N/A 1 1/2 N/A 3.50 in N/A 1.77 in N/A 1.00 in N/A 2 1/8 in
    32MSC32N N/A A-LOK® to NPT N/A 2 N/A 4.47 in N/A 2.47 in N/A 1.04 in N/A 2 3/4 in
    Unit of Measure
    1 2 3 4