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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.
  • ED fittings are supplied with sealing washers in nitrile as standard, suitable for temperatures of between -35°C and +100°C (-31°F to +212°F). Fluorocarbon seals are available upon request which are suitable for temperatures of between -25°C and +120°C (-13°F to +248°F).
    • BSPP Male Connector with ED Seal for fractional tube
    Unit of Measure
    1 

    Item #

    Connection Type

    BSPP Thread

    A

    C

    R

    X

    W HEX

    Bore

    4-4R-ED FBZ N/A CPI™ to BSPP N/A 1/4 N/A 1.48 in N/A .70 in N/A .47 in N/A .74 in N/A 3/4 in N/A .19 in
    4-8R-ED FBZ N/A CPI™ to BSPP N/A 1/2 N/A 1.76 in N/A .70 in N/A .55 in N/A 1.04 in N/A 1 1/16 in N/A .19 in
    6-6R-ED FBZ N/A CPI™ to BSPP N/A 3/8 N/A 1.60 in N/A .76 in N/A .47 in N/A .86 in N/A 7/8 in N/A .28 in
    8-4R-ED FBZ N/A CPI™ to BSPP N/A 1/4 N/A 1.69 in N/A .87 in N/A .47 in N/A .74 in N/A 13/16 in N/A .25 in
    8-6R-ED FBZ N/A CPI™ to BSPP N/A 3/8 N/A 1.69 in N/A .87 in N/A .47 in N/A .86 in N/A 7/8 in N/A .31 in
    8-8R-ED FBZ N/A CPI™ to BSPP N/A 1/2 N/A 1.85 in N/A .87 in N/A .55 in N/A 1.04 in N/A 1 1/16 in N/A .41 in
    12-12R-ED FBZ N/A CPI™ to BSPP N/A 3/4 N/A 1.98 in N/A .87 in N/A .63 in N/A 1.25 in N/A 1 5/16 in N/A .63 in
    4MSC4R-ED N/A A-LOK® to BSPP N/A 1/4 N/A 1.48 in N/A .70 in N/A .47 in N/A .74 in N/A 3/4 in N/A .19 in
    4MSC8R-ED N/A A-LOK® to BSPP N/A 1/2 N/A 1.76 in N/A .70 in N/A .55 in N/A 1.04 in N/A 1 1/16 in N/A .19 in
    6MSC6R-ED N/A A-LOK® to BSPP N/A 3/8 N/A 1.60 in N/A .76 in N/A .47 in N/A .86 in N/A 7/8 in N/A .28 in
    8MSC4R-ED N/A A-LOK® to BSPP N/A 1/4 N/A 1.69 in N/A .87 in N/A .47 in N/A .74 in N/A 13/16 in N/A .25 in
    8MSC6R-ED N/A A-LOK® to BSPP N/A 3/8 N/A 1.69 in N/A .87 in N/A .47 in N/A .86 in N/A 7/8 in N/A .31 in
    8MSC8R-ED N/A A-LOK® to BSPP N/A 1/2 N/A 1.85 in N/A .87 in N/A .55 in N/A 1.04 in N/A 1 1/16 in N/A .41 in
    12MSC12R-ED N/A A-LOK® to BSPP N/A 3/4 N/A 1.98 in N/A .87 in N/A .63 in N/A 1.25 in N/A 1 5/16 in N/A .63 in
    Unit of Measure
    1