This Part specifies the dimensional specifications and tolerances for rectangular positioning elements for plastic injection moulding. This section applies to rectangular positioning elements used in plastic injection molds. This standard also gives material guidelines and hardness requirements, and specifies the marking of rectangular positioning elements.
GB/T 4169.21-2006 Referenced Document
GB/T 4170-2006 Specification of components of injection moulds for plastics
GB/T 4169.21-2006 history
2006GB/T 4169.21-2006 Components of injection moulds for plastics.Part 21:Rectangular locating element