| A | B |
|---|
| Arc Length | symbol used to denote that a linear dimension is a curved measurement |
| Blueprint reading | process of interpreting a print to form a mental picture of how the completed object will look |
| Coaxiality | showing a common axis or axes |
| Concentricity | showing a common center |
| Conical Taper | cone shaped piece |
| Datum | theoretically exact point, axis, or plain; orgin from which the location or geometric characteristics of a part's features begins |
| Dimension orgin | used to indicate that a toleranced dimension between two features begins from one of these features |
| Feature Control Frame | geometric tolerance for an individual feature specified by a frame divided into compartments containing the geometric characteristic symbol and tolerance factor |
| Material condition | size, type, and state of material being used to produce a part |
| Number of times/places | denotes number of times or places a process is to be completed |
| Radius, Spherical radius, spherical diameter | symbols (in radius or diameter) that precede the value of a dimension or tolerance |
| Runout tolerance | composite tolerance used to control the functional relationship of one or more features of a part to a datum axis |
| Sectional view | cutaway representation that shows internal shape and construction of a part |
| Slope | used for specifying taper and incline for conical and flat tapers. Symbol is always shown with the vertical leg to the left. |
| Square | indicates that a single dimension applies to a cubed shape. |
| Taper | ratio of the difference in diameters of two sections of a cone compared to the distance between these sections |
| Tolerance | total mount by which a dimension may vary |
| Views | grouping of lines according to surfaces of the the object being viewed. Lines indicate shape, details, and size of object |
