is the default tolerance class for linear dimensions. It is the most commonly used class for machined parts.
On a drawing, you will typically see the callout near the title block, indicating that both linear and geometrical medium tolerances apply. Linear Tolerance Table (ISO 2768-m) iso 2768 medium tolerance
ISO 2768 is intended to simplify drawing indications. It allows a designer to simply state the general tolerance standard on the drawing (e.g., "ISO 2768-mK" ) rather than applying individual tolerances (like ±0.1) to every single dimension. is the default tolerance class for linear dimensions