The datum-target symbol contains the target area size (where applicable), the datum identifying letter, and the ______________________________.

Datum-Target Symbol

A graphical symbol used on engineering drawings to specify the exact points, lines, or areas on a part that a Datum is established from for measurement or tooling purposes.

Target Area Size

The specified dimensions or area where a particular operation, such as welding or machining, must be performed.

Datum Identifying Letter

A label or indication in a technical drawing that references a specific reference point, axis, or plane used as a basis for measurements or to define the geometry of the part.