ISO 9177-2:2022
Current
Current
The latest, up-to-date edition.
Mechanical pencils for technical drawings Part 2: Black leads Classification and dimensions
Available format(s)
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
Language(s)
English
Published date
01-06-2022
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).
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