We'd like to use analytics cookies to understand which symbols people look up, so we know what to research next. They are not used for advertising and we set none of them unless you say yes. What we store.
A divided circle naming a point, line or area of contact.
Also known as: Datum target point, Target area marking
A datum target names the specific points, lines or areas where a part touches its fixture, rather than treating a whole surface as the datum. It exists for castings and forgings whose surfaces are too rough to establish a datum plane reliably.
Identifies specific points, lines or areas that establish a datum, drawn as a circle divided horizontally with the target size above and its identifier below.
Contexts: Technical drawing
Exists for parts whose surfaces are too irregular to serve as datums, notably castings, forgings and weldments.
Contexts: Technical drawing
A circle divided by a horizontal line, with a numeral or dimension above and a letter and number below, joined by a leader.
One names a datum feature, the other the points on it that are used.