represents the highest level of general geometric precision (H, K, and L). It governs the "form" of the feature, ensuring parts are straight or flat enough to function without needing individual GD&T symbols on every feature. iTeh Standards ISO 2768 Tolerance Standards for CNC Machining - JLCCNC
These tolerances apply to dimensions like lengths, diameters, step heights, and radii. iso 2768-mh tolerance chart