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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.
  • For use with SAE J.1926/1 port can also be used with MS-16142 port.
  • Sizes 20, 24, 32 require 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.
  • Male Connector to SAE Straight Thread for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    Straight Thread Size

    A

    C

    R

    W HEX

    O-Ring As Uniform Dash No.

    1M1SC2 N/A A-LOK® to SAE N/A 5/16-24 N/A .92 in N/A .43 in N/A .30 in N/A 7/16 in N/A 3-902
    2M1SC2 N/A A-LOK® to SAE N/A 5/16-24 N/A 1.18 in N/A .60 in N/A .30 in N/A 7/16 in N/A 3-902
    2M1SC6 N/A A-LOK® to SAE N/A 9/16-18 N/A 1.35 in N/A .60 in N/A .39 in N/A 11/16 in N/A 3-906
    3M1SC3 N/A A-LOK® to SAE N/A 3/8-24 N/A 1.20 in N/A .64 in N/A .30 in N/A 1/2 in N/A 3-903
    4M1SC4 N/A A-LOK® to SAE N/A 7/16-20 N/A 1.34 in N/A .70 in N/A .36 in N/A 9/16 in N/A 3-904
    4M1SC6 N/A A-LOK® to SAE N/A 9/16-18 N/A 1.40 in N/A .70 in N/A .39 in N/A 11/16 in N/A 3-906
    4M1SC8 N/A A-LOK® to SAE N/A 3/4-16 N/A 1.48 in N/A .70 in N/A .44 in N/A 7/8 in N/A 3-908
    4M1SC10 N/A A-LOK® to SAE N/A 7/8-14 N/A 1.60 in N/A .70 in N/A .50 in N/A 1 in N/A 3-910
    5M1SC5 N/A A-LOK® to SAE N/A 1/2-20 N/A 1.37 in N/A .73 in N/A .36 in N/A 5/8 in N/A 3-905
    6M1SC4 N/A A-LOK® to SAE N/A 7/16-20 N/A 1.40 in N/A .76 in N/A .36 in N/A 5/8 in N/A 3-904
    6M1SC6 N/A A-LOK® to SAE N/A 9/16-18 N/A 1.46 in N/A .76 in N/A .39 in N/A 11/16 in N/A 3-906
    6M1SC8 N/A A-LOK® to SAE N/A 3/4-16 N/A 1.54 in N/A .76 in N/A .44 in N/A 7/8 in N/A 3-908
    6M1SC10 N/A A-LOK® to SAE N/A 7/8-14 N/A 1.67 in N/A .76 in N/A .50 in N/A 1.00 in N/A 3-910
    8M1SC6 N/A A-LOK® to SAE N/A 9/16-18 N/A 1.54 in N/A .87 in N/A .39 in N/A 7/8 in N/A 3-906
    8M1SC8 N/A A-LOK® to SAE N/A 3/4-16 N/A 1.65 in N/A .87 in N/A .44 in N/A 7/8 in N/A 3-908
    8M1SC12 N/A A-LOK® to SAE N/A 1 1/16-12 N/A 1.93 in N/A .87 in N/A .59 in N/A 1-1/4 in N/A 3-912
    10M1SC10 N/A A-LOK® to SAE N/A 7/8-14 N/A 1.78 in N/A .87 in N/A .50 in N/A 1 in N/A 3-910
    12M1SC10 N/A A-LOK® to SAE N/A 7/8-14 N/A 1.68 in N/A .87 in N/A .50 in N/A 1 1/8 in N/A 3-910
    12M1SC12 N/A A-LOK® to SAE N/A 1 1/16-12 N/A 1.93 in N/A .87 in N/A .59 in N/A 1 1/4 in N/A 3-912
    14M1SC14 N/A A-LOK® to SAE N/A 1 3/16-12 N/A 1.93 in N/A .87 in N/A .59 in N/A 1 3/8 in N/A 3-914
    16M1SC12 N/A A-LOK® to SAE N/A 1 1/16-12 N/A 2.12 in N/A 1.05 in N/A .59 in N/A 1 3/8 in N/A 3-912
    16M1SC16 N/A A-LOK® to SAE N/A 1 5/16-12 N/A 2.15 in N/A 1.05 in N/A .59 in N/A 1 1/2 in N/A 3-916
    20M1SC20 N/A A-LOK® to SAE N/A 1 5/8-12 N/A 2.59 in N/A 1.52 in N/A .59 in N/A 1 7/8 in N/A 3-920
    24M1SC24 N/A A-LOK® to SAE N/A 1 7/8-12 N/A 3.05 in N/A 1.77 in N/A .59 in N/A 2 1/8 in N/A 3-924
    32M1SC32 N/A A-LOK® to SAE N/A 2 1/2-12 N/A 4.00 in N/A 2.47 in N/A .59 in N/A 2 3/4 in N/A 3-932
    Unit of Measure
    1 2