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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.
  • Parts are supplied with nitrile o-rings as standard. For Fluorocarbon o-rings, add the suffix "-VO".
  • Other o-rings available upon request.
  • Adapter fitting for connection of NPT to SAE female threads.
  • NPT Thread to SAE Straight Thread Adapter for fractional tube
    Unit of Measure
    1 

    Item #

    Connection Type

    T2 NPT Thread

    T1 SAE Straight Thread

    A

    R1

    R2

    W HEX

    O-Ring As Uniform Dash No.

    4-4 FHOA N/A NPT x SAE Straight Thread N/A 1/4 N/A 7/16-20 N/A 1.20 in N/A .56 in N/A .36 in N/A 9/16 in N/A 3-904
    6-6 FHOA N/A NPT x SAE Straight Thread N/A 3/8 N/A 9/16-18 N/A 1.26 in N/A .56 in N/A .39 in N/A 11/16 in N/A 3-906
    8-8 FHOA N/A NPT x SAE Straight Thread N/A 1/2 N/A 3/4-16 N/A 1.53 in N/A .76 in N/A .44 in N/A 7/8 in N/A 3-908
    12-12 FHOA N/A NPT x SAE Straight Thread N/A 3/4 N/A 1 1/16-12 N/A 1.75 in N/A .75 in N/A .59 in N/A 1 1/4 in N/A 3-912
    16-16 FHOA N/A NPT x SAE Straight Thread N/A 1 N/A 1 5/16-12 N/A 2.00 in N/A .94 in N/A .59 in N/A 1 1/2 in N/A 3-916
    Unit of Measure
    1