DFARS (Defense Acquisition Regulations Supplement)
    DFARS (Defense Acquisition
    Regulations Supplement)
    End Construction
    End Construction
    Plain
    Rolled
    Crimped
    Tapered
    Spiral
    Gender
    Gender
    Female
    Male
    Flange Mount Type
    Flange Mount Type
    Screw On
    Weld On
    Duct Construction
    Duct Construction
    Closed
    Open
    Overall Depth
    Overall Depth
    1"
    1 1/4"
    1 1/2"
    2"
    2 1/4"
    3 1/4"
    3 1/2"
    Number of Mounting Holes
    Number of Mounting Holes
    4
    6
    8
    10
    12
    16
    18
    24
    Mounting Hole Diameter
    Mounting Hole Diameter
    9/32"
    5/16"
    3/8"
    7/16"
    Flange Thickness
    Flange Thickness
    1/8"
    9/64"
    3/16"
    1/4"
    Flange Height
    Flange Height
    1"
    1 1/4"
    1 3/8"
    1 1/2"
    1 3/4"
    2"
    Wye Angle
    Wye Angle
    30°
    45°
    90°