Counterbored holes (CBORE) are holes of different depths that share
concentric centers. There is no angularity in the larger bore. Dimension
counterbored holes as two concentric diameters and a depth. Where the
thickness of the remaining material has significance, dimension the thickness
rather than the depth of the hole.
Figure 3-32 illustrates counterbored dimensioning.
Figure 3-32.Counterbore dimensions.
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