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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.
    • NPT Male Run Tee for metric tube
    Unit of Measure
    1 

    Item #

    Connection Type

    Tube O.D.

    NPT Pipe Thread

    A

    C

    H

    L

    R

    W HEX

    RBZ 6-1/8-6 N/A CPI™ x NPT x CPI™ N/A 6.0 mm N/A 1/8 N/A 45.7 mm N/A 26.8 mm N/A 18.9 mm N/A 19.5 mm N/A 9.7 mm N/A 1/2 in
    RBZ 6-1/4-6 N/A CPI™ x NPT x CPI™ N/A 6.0 mm N/A 1/4 N/A 50.4 mm N/A 26.8 mm N/A 23.6 mm N/A 19.5 mm N/A 14.5 mm N/A 1/2 in
    RBZ 8-1/8-8 N/A CPI™ x NPT x CPI™ N/A 8.0 mm N/A 1/8 N/A 50.7 mm N/A 29.9 mm N/A 20.8 mm N/A 22.4 mm N/A 9.7 mm N/A 5/8 in
    RBZ 8-1/4-8 N/A CPI™ x NPT x CPI™ N/A 8.0 mm N/A 1/4 N/A 55.3 mm N/A 29.9 mm N/A 25.4 mm N/A 22.4 mm N/A 14.5 mm N/A 5/8 in
    RBZ 10-1/4-10 N/A CPI™ x NPT x CPI™ N/A 10.0 mm N/A 1/4 N/A 61.9 mm N/A 33.5 mm N/A 28.4 mm N/A 25.9 mm N/A 14.5 mm N/A 13/16 in
    RBZ 10-1/2-10 N/A CPI™ x NPT x CPI™ N/A 10.0 mm N/A 1/2 N/A 66.7 mm N/A 33.5 mm N/A 33.2 mm N/A 25.9 mm N/A 19.2 mm N/A 13/16 in
    RBZ 12-1/4-12 N/A CPI™ x NPT x CPI™ N/A 12.0 mm N/A 1/4 N/A 64.4 mm N/A 36.0 mm N/A 28.4 mm N/A 25.9 mm N/A 14.5 mm N/A 13/16 in
    RBZ 12-3/8-12 N/A CPI™ x NPT x CPI™ N/A 12.0 mm N/A 3/8 N/A 64.4 mm N/A 36.0 mm N/A 28.4 mm N/A 25.9 mm N/A 14.5 mm N/A 13/16 in
    RBZ 12-1/2-12 N/A CPI™ x NPT x CPI™ N/A 12.0 mm N/A 1/2 N/A 69.2 mm N/A 36.0 mm N/A 33.2 mm N/A 25.9 mm N/A 19.2 mm N/A 13/16 in
    RBZ 16-1-16 N/A CPI™ x NPT x CPI™ N/A 16.0 mm N/A 1 N/A 89.8 mm N/A 43.1 mm N/A 46.7 mm N/A 32.9 mm N/A 24.0 mm N/A 1 3/8 in
    M6MRT1/8N N/A A-LOK® x NPT x A-LOK® N/A 6.0 mm N/A 1/8 N/A 45.7 mm N/A 26.8 mm N/A 18.9 mm N/A 19.5 mm N/A 9.7 mm N/A 1/2 in
    M6MRT1/4N N/A A-LOK® x NPT x A-LOK® N/A 6.0 mm N/A 1/4 N/A 50.4 mm N/A 26.8 mm N/A 23.6 mm N/A 19.5 mm N/A 14.5 mm N/A 1/2 in
    M8MRT1/8N N/A A-LOK® x NPT x A-LOK® N/A 8.0 mm N/A 1/8 N/A 50.7 mm N/A 29.9 mm N/A 20.8 mm N/A 22.4 mm N/A 9.7 mm N/A 5/8 in
    M8MRT1/4N N/A A-LOK® x NPT x A-LOK® N/A 8.0 mm N/A 1/4 N/A 55.3 mm N/A 29.9 mm N/A 25.4 mm N/A 22.4 mm N/A 14.5 mm N/A 5/8 in
    M10MRT1/4N N/A A-LOK® x NPT x A-LOK® N/A 10.0 mm N/A 1/4 N/A 61.9 mm N/A 33.5 mm N/A 28.4 mm N/A 25.9 mm N/A 14.5 mm N/A 13/16 in
    M10MRT1/2N N/A A-LOK® x NPT x A-LOK® N/A 10.0 mm N/A 1/2 N/A 66.7 mm N/A 33.5 mm N/A 33.2 mm N/A 25.9 mm N/A 19.2 mm N/A 13/16 in
    M12MRT1/4N N/A A-LOK® x NPT x A-LOK® N/A 12.0 mm N/A 1/4 N/A 64.4 mm N/A 36.0 mm N/A 28.4 mm N/A 25.9 mm N/A 14.5 mm N/A 13/16 in
    M12MRT3/8N N/A A-LOK® x NPT x A-LOK® N/A 12.0 mm N/A 3/8 N/A 64.4 mm N/A 36.0 mm N/A 28.4 mm N/A 25.9 mm N/A 14.5 mm N/A 13/16 in
    M12MRT1/2N N/A A-LOK® x NPT x A-LOK® N/A 12.0 mm N/A 1/2 N/A 69.2 mm N/A 36.0 mm N/A 33.2 mm N/A 25.9 mm N/A 19.2 mm N/A 13/16 in
    M16MRT1N N/A A-LOK® x NPT x A-LOK® N/A 16.0 mm N/A 1 N/A 89.8 mm N/A 43.1 mm N/A 46.7 mm N/A 32.9 mm N/A 24.0 mm N/A 1 3/8 in
    Unit of Measure
    1