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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.
  • Sealing washer must be used with BSPP end shown ISO228/1 (Form A). See page 76.
  • For Form B undercut change part number and add B before R. e.g. M6MSC1/4BR.
    • BSPP Male Connector for fractional tube
    Unit of Measure
    1 2 

    Item #

    Connection Type

    BSPP Thread

    A

    C

    R

    X

    W HEX

    Bore

    2-2R FBZ N/A CPI™ to BSPP N/A 1/8 N/A 1.18 in N/A .60 in N/A .28 in N/A .54 in N/A 9/16 in N/A .16 in
    2-4R FBZ N/A CPI™ to BSPP N/A 1/4 N/A 1.27 in N/A .60 in N/A .44 in N/A .70 in N/A 3/4 in N/A .09 in
    2-6R FBZ N/A CPI™ to BSPP N/A 3/8 N/A 1.46 in N/A .60 in N/A .44 in N/A .86 in N/A 7/8 in N/A .19 in
    4-2R FBZ N/A CPI™ to BSPP N/A 1/8 N/A 1.28 in N/A .70 in N/A .28 in N/A .54 in N/A 9/16 in N/A .16 in
    4-4R FBZ N/A CPI™ to BSPP N/A 1/4 N/A 1.49 in N/A .70 in N/A .44 in N/A .70 in N/A 3/4 in N/A .19 in
    4-6R FBZ N/A CPI™ to BSPP N/A 3/8 N/A 1.55 in N/A .70 in N/A .44 in N/A .86 in N/A 7/8 in N/A .19 in
    4-8R FBZ N/A CPI™ to BSPP N/A 1/2 N/A 1.77 in N/A .70 in N/A .56 in N/A 1.01 in N/A 1 1/16 in N/A .19 in
    6-2R FBZ N/A CPI™ to BSPP N/A 1/8 N/A 1.35 in N/A .76 in N/A .28 in N/A .54 in N/A 5/8 in N/A .16 in
    6-4R FBZ N/A CPI™ to BSPP N/A 1/4 N/A 1.54 in N/A .76 in N/A .44 in N/A .70 in N/A 3/4 in N/A .25 in
    6-6R FBZ N/A CPI™ to BSPP N/A 3/8 N/A 1.57 in N/A .76 in N/A .44 in N/A .86 in N/A 7/8 in N/A .28 in
    6-8R FBZ N/A CPI™ to BSPP N/A 1/2 N/A 1.82 in N/A .76 in N/A .56 in N/A 1.01 in N/A 1 1/16 in N/A .28 in
    8-4R FBZ N/A CPI™ to BSPP N/A 1/4 N/A 1.66 in N/A .87 in N/A .44 in N/A .70 in N/A 13/16 in N/A .25 in
    8-6R FBZ N/A CPI™ to BSPP N/A 3/8 N/A 1.69 in N/A .87 in N/A .44 in N/A .86 in N/A 7/8 in N/A .31 in
    8-8R FBZ N/A CPI™ to BSPP N/A 1/2 N/A 1.91 in N/A .87 in N/A .56 in N/A 1.01 in N/A 1 1/16 in N/A .41 in
    12-8R FBZ N/A CPI™ to BSPP N/A 1/2 N/A 1.93 in N/A .87 in N/A .56 in N/A 1.01 in N/A 1 1/16 in N/A .41 in
    12-12R FBZ N/A CPI™ to BSPP N/A 3/4 N/A 2.07 in N/A .87 in N/A .63 in N/A 1.25 in N/A 1 3/8 in N/A .63 in
    16-8R FBZ N/A CPI™ to BSPP N/A 1/2 N/A 2.21 in N/A 1.05 in N/A .56 in N/A 1.01 in N/A 1 3/8 in N/A .41 in
    16-16R FBZ N/A CPI™ to BSPP N/A 1 N/A 2.35 in N/A 1.05 in N/A .72 in N/A 1.52 in N/A 1 5/8 in N/A .88 in
    2MSC2R N/A A-LOK® to BSPP N/A 1/8 N/A 1.18 in N/A .60 in N/A .28 in N/A .54 in N/A 9/16 in N/A .16 in
    2MSC4R N/A A-LOK® to BSPP N/A 1/4 N/A 1.27 in N/A .60 in N/A .44 in N/A .70 in N/A 3/4 in N/A .09 in
    2MSC6R N/A A-LOK® to BSPP N/A 3/8 N/A 1.46 in N/A .60 in N/A .44 in N/A .86 in N/A 7/8 in N/A .19 in
    4MSC2R N/A A-LOK® to BSPP N/A 1/8 N/A 1.28 in N/A .70 in N/A .28 in N/A .54 in N/A 9/16 in N/A .16 in
    4MSC4R N/A A-LOK® to BSPP N/A 1/4 N/A 1.49 in N/A .70 in N/A .44 in N/A .70 in N/A 3/4 in N/A .19 in
    4MSC6R N/A A-LOK® to BSPP N/A 3/8 N/A 1.55 in N/A .70 in N/A .44 in N/A .86 in N/A 7/8 in N/A .19 in
    4MSC8R N/A A-LOK® to BSPP N/A 1/2 N/A 1.77 in N/A .70 in N/A .56 in N/A 1.01 in N/A 1 1/16 in N/A .19 in
    Unit of Measure
    1 2