Fig Basic Dimension Symbol

3.3.10 Statistical Tolerancing Symbol. The symbolic means of indicating that a tolerance is based on statistical tolerancing is shown in Fig. 3-8. If the tolerance is a statistical geometric tolerance, the symbol is placed in the feature control frame following the stated tolerance and any modifier See Fig. 3-9. If the tolerance is a statistical size tolerance, the symbol is placed adjacent to the size dimension. See Figs. 2-20 and 3-10.

3.3.11 Between Symbol. The symbolic means of indicating that a tolerance applies to a limited segment of a surface between designated extremities is shown in Figs. 3-8, 3-11, 6-13, and 6-14. In Fig. 3-11, for example, the tolerance applies only between point G and point H.

3.3.12 Courtterbore or Spotface Symbol. The symbolic means of indicating a counterbore or a spotface is shown in Fig. 3-12. The symbol precedes, with no space, the dimension of the counterbore or spotface.

3.3.13 Countersink Symbol. The symbolic means of indicating a countersink is shown in Fig. 3-13. The symbol precedes, with no space, the dimensions of the countersink.

3.3.14 Depth Symbol. The symbolic means of indicating that a dimension applies to the depth of a feature is to precede that dimension with the depth symbol, as shown in Fig. 3-14. The symbol ar.d the value are not separated by a space.

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