A circled number identifying each part shown in an assembly drawing. Also called a ball tag or bubble number.
A section of an object broken away to reveal an interior feature for a sectional drawing.
An assembly drawing in which parts are moved out of position along an axis so that each individual part is visible.
A sectional drawing based on a cutting plane line that extends completely through an object.
metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated
a quantity (such as the mean or variance) that characterizes a statistical population and that can be estimated by calculations from sample data
A CAD modeling method that uses parameters to define the size and geometry of features and to create relationships between features. Changing a parameter value updates all related features of the model at once.
Lines that are used to represent the material through which a cut is made in order to show an interior sectional view.
A table located in the bottom right-hand corner of an engineering drawing that identifies, in an organized way, all of the necessary information that is not given on the drawing itself. Also referred to as a title strip.
Cutting Plane Line
a line drawn on a view where a cut was made in order to define the location of the imaginary section plane.
A sectional drawing based on a cutting plane line that cuts through one-quarter of an object. A half section reveals half of the interior and half of the exterior.
A list of materials or parts specified for a project. Also referred to as a bill of materials or BOM.
A drawing that shows the interior of an object as it would appear if cut in half or quartered.
An orthographic view of an object using a direction of sight other than one of the six basic views (front, top, right-side, rear, bottom, left-side); used to show a surface that is not parallel to any of the principal view planes.
A line used to show the alternate positions of an object or matching part without interfering with the main drawing.
A shallow recess like a counterbore, used to provide a good bearing surface for a fastener.