ISO 2768-mk is the "Goldilocks" of manufacturing tolerances—not too tight, not too loose. It ensures that parts are functional and interchangeable without unnecessary manufacturing expenses. When you see it on a drawing, you’re looking at a standard of and Medium Geometrical control .

In the world of precision manufacturing, specifying every single dimension with a dedicated tolerance would make technical drawings cluttered and nearly impossible to read. To solve this, engineers use general tolerance standards. The most common among these is .

Refers to Part 1 of the standard, covering Linear and Angular dimensions . The 'm' stands for Medium .

ISO 2768-mk is a "general" standard. You should never rely on it for: High-precision fits (e.g., H7/g6).

If you’ve seen "ISO 2768-mk" in the title block of a blueprint, What is ISO 2768?

Parts made from plastics or materials with high thermal expansion (the standard is primarily designed for metal removal/machining). Dimensions where safety or critical function is at stake.