Geometric Tolerances - Do standards for defining "general geometric tolerances" exist For example, if I want to define non-geometric tolerances for the whole part, I just write what type of IT it is. For instance, IT8. And then the manufacturer just looks at the chart to know the tolerances he should use. Now, if I want to define general GEOMETRIC tolerances for the whole part - is there a standard for that? Or do I have to define everything one by one?