ISO 20457 is the modern international successor to the older DIN 16901 standard. It defines nine tolerance grades (TG1 to TG9), where is the tightest (highest precision) and is the loosest. Boyan Manufacturing Solutions Application of TG5
. This group is typically utilized for precision-moulded components that require tighter control than standard commercial parts but are less restrictive than high-precision Class A components. Iso 20457 Tg5