ISO 20457 is an international standard defining tolerances and acceptance conditions for molded plastic parts, with TG5 (Tolerance Group 5) representing a mid-range precision level. This standard, which often replaces DIN 16742, dictates allowable dimensional variations based on material, process, and geometry to ensure consistent quality in technical components. For a detailed application example, see this Würth Elektronik datasheet . 960070084 Datasheet WA-SPARO Round Plastic Spacers
: For critical assemblies, GD&T should be used alongside the standard TG5 linear tolerances to control feature orientation and position. Why TG5 Matters for Designers and Manufacturers Choosing TG5 is a strategic decision that balances Iso 20457 Tg5