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A think line that shows the visible edges of an object. The most clearly visible line in a drawing.
A thin dashed line that shows an edge not normally visible in a view. Dashes are 1/8" long with spaces of 1/16"
A thin line that shows the center points of arcs, circles, and the center of symetrical objects. Short dash is 1/8" and long dash ranges from 1/2" to 1-1/2" in length. Center lines always extend 1/4" Beyond the object they are applied to.
A thin line that extends from the dimension line to the point on the object to which the dimension refers.
A thin, angled line with an arrowhead at one end and a note or dimension at the other. Used to show the exact location of note or dimension
A thin line used to show the surface cut in a section view. Drawn diagonal on each surface touched by the cutting-plane
Inclined Plane or Surface
A plane surface that is foreshortened in two principal viewing planes and an edge view in one other principal viewing plane
A true size of a plane that is parallel to one principal viewing plane and shown as an edge view in other two principal views
Oblique Plane or Surface
A plane or surface that is foreshortened in all three principal viewing planes.
Straight element that is generated by a moving point and has extension only along the path of the point
True size plane that is parallel to one principal viewing plane and edge view in other two planes
Method of representing the exact shape of an object in two or more views on planes at right angles to each other
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