Figure 7.2 shows a typical collective single-part drawing for a rivet. The drawing covers 20 rivets similar in every respect except length; in the example given, the part number for a 30 mm rivet is S123/13. This type of drawing can also be used where, for example, one or two dimensions on a component (which are referred to on the drawing as A and B) are variable, all others being standard. For a particular application, the draughtsman would insert the appropriate value of dimensions A and B in a table, then add a new suffix to the part number. This type of drawing can generally be used for basically similar parts.
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