If "MS 81:2021" is a misremembered code, it may refer to these recent 2021 updates:
This standard defines General Dimension Tolerances for parts produced via press working (sheet metal) . ms812021 standard pdf best
You still need a licensed copy for legal compliance. Purchasing the standard is typically cheaper than a single non-conformance report or recall. If "MS 81:2021" is a misremembered code, it