Cases and housings where dimensional stability is necessary for snap-fits or screw bosses.

The standard doesn't just provide a table of numbers; it calculates tolerances based on several variables: 1. Mold-Fixed vs. Non-Mold-Fixed Dimensions

Dimensions affected by moving tool parts, such as sliders, cores, or the parting line. These usually have wider tolerances because they are subject to tool opening/closing variances. 2. Material Behavior

DIN 16742 requires that dimensions be measured under specific , usually 16 to 24 hours after molding at a standard atmosphere of 23°C and 50% humidity.

Dimensions determined by a single part of the mold tool. These are typically more accurate.

TG5 is widely regarded as the . While groups like TG1 through TG3 are reserved for extreme precision (often requiring specialized high-stability materials and rigorous process control), TG5 is used for: