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Watch where you put that triangle!
(In accordance with Y14.5M-1994 standard)

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Placement of the new datum feature symbol (triangle) can be critical.  In the first three views below the datum feature symbol is associated with the size dimension of a  feature of size.  They indicate that a datum axis should be established using the feature indicated.

In the view below, the datum may be interpreted as a line lying in a plane tangent to the feature indicated.  If line contact is desired a datum target line should be indicated.

Back to Tips Tip added Sep 1999