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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.
  • Pipe buttweld end will conform to Schedule 80 unless otherwise noted.
  • Adapter fitting for connection of compression fittings to welded systems.
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    Item #

    Connection Type

    Buttweld Pipe Size

    C

    H

    L

    R

    X Buttweld O.D.

    W HEX

    N/A CPI™ x Buttweld N/A 1/8 in N/A .93 in N/A .70 in N/A .67 in N/A .38 in N/A .41 in N/A 7/16 in
    N/A CPI™ x Buttweld N/A 1/8 in N/A 1.01 in N/A .74 in N/A .74 in N/A .38 in N/A .41 in N/A 7/16 in
    N/A CPI™ x Buttweld N/A 1/8 in N/A 1.06 in N/A .74 in N/A .77 in N/A .38 in N/A .41 in N/A 7/16 in
    N/A CPI™ x Buttweld N/A 1/4 in N/A 1.10 in N/A .97 in N/A .78 in N/A .56 in N/A .54 in N/A 9/16 in
    N/A CPI™ x Buttweld N/A 1/4 in N/A 1.20 in N/A 1.00 in N/A .91 in N/A .56 in N/A .54 in N/A 5/8 in
    N/A CPI™ x Buttweld N/A 3/8 in N/A 1.42 in N/A 1.11 in N/A 1.02 in N/A .56 in N/A .68 in N/A 13/16 in
    N/A CPI™ x Buttweld N/A 1/2 in N/A 1.42 in N/A 1.30 in N/A 1.02 in N/A .75 in N/A .84 in N/A 7/8 in
    N/A CPI™ x Buttweld N/A 1/2 in N/A 1.50 in N/A 1.39 in N/A 1.10 in N/A .75 in N/A .84 in N/A 15/16 in
    N/A CPI™ x Buttweld N/A 3/4 in N/A 1.57 in N/A 1.45 in N/A 1.17 in N/A .75 in N/A 1.05 in N/A 1 1/16 in
    N/A CPI™ x Buttweld N/A 3/4 in N/A 1.94 in N/A 1.64 in N/A 1.45 in N/A .75 in N/A 1.05 in N/A 1 3/8 in
    N/A CPI™ x Buttweld N/A 1 in N/A 1.94 in N/A 1.84 in N/A 1.45 in N/A .94 in N/A 1.31 in N/A 1 5/16 in
    N/A A-LOK® x Buttweld N/A 1/8 in N/A .93 in N/A .70 in N/A .67 in N/A .38 in N/A .41 in N/A 7/16 in
    N/A A-LOK® x Buttweld N/A 1/8 in N/A 1.01 in N/A .74 in N/A .74 in N/A .38 in N/A .41 in N/A 7/16 in
    N/A A-LOK® x Buttweld N/A 1/8 in N/A 1.06 in N/A .74 in N/A .77 in N/A .38 in N/A .41 in N/A 7/16 in
    N/A A-LOK® x Buttweld N/A 1/4 in N/A 1.10 in N/A .97 in N/A .78 in N/A .56 in N/A .54 in N/A 9/16 in
    N/A A-LOK® x Buttweld N/A 1/4 in N/A 1.20 in N/A 1.00 in N/A .91 in N/A .56 in N/A .54 in N/A 5/8 in
    N/A A-LOK® x Buttweld N/A 3/8 in N/A 1.42 in N/A 1.11 in N/A 1.02 in N/A .56 in N/A .68 in N/A 13/16 in
    N/A A-LOK® x Buttweld N/A 1/2 in N/A 1.42 in N/A 1.30 in N/A 1.02 in N/A .75 in N/A .84 in N/A 7/8 in
    N/A A-LOK® x Buttweld N/A 1/2 in N/A 1.50 in N/A 1.39 in N/A 1.10 in N/A .75 in N/A .84 in N/A 15/16 in
    N/A A-LOK® x Buttweld N/A 3/4 in N/A 1.57 in N/A 1.45 in N/A 1.17 in N/A .75 in N/A 1.05 in N/A 1 1/16 in
    N/A A-LOK® x Buttweld N/A 3/4 in N/A 1.94 in N/A 1.64 in N/A 1.45 in N/A .75 in N/A 1.05 in N/A 1 3/8 in
    N/A A-LOK® x Buttweld N/A 1 in N/A 1.94 in N/A 1.84 in N/A 1.45 in N/A .94 in N/A 1.31 in N/A 1 5/16 in
    1 - 22 of 22 | Results Per Page | View | Unit of Measure
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