: The diameters and spacing of holes or internal cutouts.

: Focuses directly on general tolerances for traditional component machining, such as metal removal, drilling, and milling.

Much like ISO or JIS international standards, MS81-2021 groups dimensional compliance into distinct grades depending on the necessary precision of the part:

What Stands Out

: The standard class used for most general machining. c (Coarse) : For parts where precision is less critical.

– MS81 is typically a Malaysian Standard. If you clarify the topic (e.g., food safety, construction, palm oil, etc.), I can provide a general summary of what such a standard typically covers, based on public information.