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Mechanical pencils for technical drawings - Part 2: Black leads - Classification and dimensions

Overview SIST ISO 9177-2:2024, issued by the Slovenian Institute for Standardization (SIST), specifies the classification and dimensions for black leads used in mechanical pencils designed for techni…

Mechanical pencils for technical drawings — Part 2: Black leads — Classification and dimensions

Overview ISO 9177-2:2022 - Mechanical pencils for technical drawings - Part 2: Black leads - Classification and dimensions specifies the classification, nominal diameters and standard lengths for bla…

Mechanical pencils — Part 2: Black leads — Classification and dimensions