| A | B |
|---|
| Assembly | A drawing that shows the various parts of an item when assembled |
| Auxiliary View | An orthographic view of an object using a direction of sight other than one of the six basic views |
| Balloons | A circled number identifying each part shown in an assembly drawing |
| Blind Hole | A hole that does not go completely through the workpiece |
| Break Line | A line used to interrupt a drawing if an object will not fit on a drawing sheet |
| Clearance Fit | The total gap between two mating parts, such as the difference in diameters between a cylindrical shaft and a hole |
| Counterbore | A cylindrical recess around a hole, usually to receive a bolt head or nut |
| Countersink | A conical-shaped recess around a hole, often used to recieve a tapered screw |
| Cutting Plane Line | A line drawn on a view where a cut was made in order to define the location of the imaginary cutting plane |
| Exploded Assembly | An assembly drawing in which the parts are moved out of position along an axis so that each individual part is visible |
| Full Section | A sectional drawing based on a cutting line that extends completely through an object |
| Half Section | A sectional drawing based on a cutting plane line that cuts through one-quarter of an object |
| Aligned Section | A sectional drawing based on a cutting plane line that aligns with a feature of part of the object |
| Section Lines | Lines that are used to represent the material through which a cut is made in order to show an interior sectional view |
| Sectional View | A drawing that shows the interior of an object as it would apear if cut in half or quartered. |
| Subassembly | An assembled part that is part of a larger assembly |
| Title Block | A table located in the bottom right-hand corner of an engineering drawing that identifies all of the necessary information that is not given on the drawing itself |
| Parts List | A list of materials or parts specified for a project |
| Spotface | A shallow recess like a counterbore, used to provide a good bearing surface for a fastener |
