: This tolerance class defines the medium tolerance for linear dimensions. It offers a balanced approach, providing reasonable tolerances that are not too tight, which could be difficult and costly to achieve, nor too loose, which could compromise the functionality and interchangeability of parts.

Class 'K' provides general geometric limits for the form and orientation of features. It is divided into three classes: H (fine), K (medium), and L (coarse). Straightness and Flatness: