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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.
  • Size 24 is preassembled with nut and ferrules.
  • A dimension is typical finger-tight.
  • Size 24 requires additional lubrication prior to assembly.
  • Parts are supplied with nitrile o-rings as standard. For Fluorocarbon o-rings, add the suffix “-VO”.
  • Other o-rings available upon request.
  • Add -Z6 for assembly of nuts and ferrules on the tube stub end.
  • Tube End to SAE Straight Thread Adapter for fractional tube
    Unit of Measure
    1 

    Item #

    Connection Type

    Tube O.D.

    Straight Thread Size

    A

    K

    R

    W HEX

    O-Ring Arp Uniform Dash No.

    6-4 T2HOA N/A Straight Thread to Tube N/A 3/8 in N/A 7/16-20 N/A 1.46 in N/A .69 in N/A .36 in N/A 9/16 in N/A 3-904
    6-8 T2HOA N/A Straight Thread to Tube N/A 3/8 in N/A 3/4-16 N/A 1.59 in N/A .69 in N/A .44 in N/A 7/8 in N/A 3-908
    8-6 T2HOA N/A Straight Thread to Tube N/A 1/2 in N/A 9/16-18 N/A 1.74 in N/A .91 in N/A .39 in N/A 11/16 in N/A 3-906
    10-10 T2HOA N/A Straight Thread to Tube N/A 5/8 in N/A 7/8-14 N/A 2.00 in N/A .91 in N/A .50 in N/A 1 in N/A 3-910
    24-24 T2HOA N/A Straight Thread to Tube N/A 1 1/2 in N/A 1 7/8-12 N/A 3.28 in N/A 2.05 in N/A .59 in N/A 2 1/8 in N/A 3-924
    6TUHOA4 N/A Straight Thread to Tube N/A 3/8 in N/A 7/16-20 N/A 1.46 in N/A .69 in N/A .36 in N/A 9/16 in N/A 3-904
    6TUHOA8 N/A Straight Thread to Tube N/A 3/8 in N/A 3/4-16 N/A 1.59 in N/A .69 in N/A .44 in N/A 7/8 in N/A 3-908
    8TUHOA6 N/A Straight Thread to Tube N/A 1/2 in N/A 9/16-18 N/A 1.74 in N/A .91 in N/A .39 in N/A 11/16 in N/A 3-906
    10TUHOA10 N/A Straight Thread to Tube N/A 5/8 in N/A 7/8-14 N/A 1.94 in N/A .91 in N/A .50 in N/A 1 in N/A 3-910
    24TUHOA24 N/A Straight Thread to Tube N/A 1 1/2 in N/A 1 7/8-12 N/A 3.28 in N/A 2.05 in N/A .59 in N/A 2 1/8 in N/A 3-924
    Unit of Measure
    1