Defines the ISO system of limits and fits specifically for internal features (holes). Size Range: Covers nominal dimensions from 1 mm to 500 mm .
The standard, titled "ISO-deviations for holes for sizes from 1 to 500 mm," is a foundational document for engineering tolerances used in precision manufacturing. It provides specific numerical values for allowable deviations in hole dimensions to ensure parts fit together correctly. Key Features of DIN 7161 din 7161 pdf