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ISO 20457 is the international standard governing tolerances and acceptance conditions for plastic molded parts. Within this standard, Tolerance Group 5 (TG5)
The allowable deviation in TG5 scales with the size of the part; larger parts naturally have wider absolute tolerances.
ISO 20457 TG5 is a specific precision classification within the international standard ISO 20457:2018 , which defines the dimensional and geometrical tolerances for plastic molded parts. TG5 (Tolerance Group 5) is widely recognized as the baseline or standard precision grade for industrial and technical plastic applications, particularly for housings and structural components . What is ISO 20457?
Disclaimer: This article is for informational purposes. Always consult the official ISO 20457:2020 document for definitive testing requirements.