International Standard
ISO 9177-2:2022
Mechanical pencils for technical drawings — Part 2: Black leads — Classification and dimensions
Reference number
ISO 9177-2:2022
ISO 9177-2:2022
Edición 2
2022-06
2022-06
© ISO 2024
International Standard
Resumen
This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings.
Two types of black leads are available:
— polymer leads (designated by the letter “P”);
— ceramic leads (designated by the letter “C”).
Ciclo de vida
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Anteriormente
RetiradaISO 9177-2:1989
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Ahora
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