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Norm
ISO 9177-2:2022
Issue date: 2022 06 01
Mechanical pencils for technical drawings — Part 2: Black leads — Classification and dimensions
This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings.
Two types of black leads are available:
— p...
Valid
Publisher:
International Organization for Standardization
Format:
Digital | 4 Pages
Language:
English
Topics
show all
IT, communication & electronic, Domestic engineering, Miscellaneous domestic and commercial equipment
Electric & lighting engineering, Domestic engineering, Miscellaneous domestic and commercial equipment
Building services engineering & equipment, Domestic engineering, Miscellaneous domestic and commercial equipment
Safety, Domestic engineering, Miscellaneous domestic and commercial equipment
Mechanical engineering foundations & materials, Technical drawing and graphical symbols, Drawing equipment
Services & management, Technical drawing and graphical symbols, Drawing equipment
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”).
ISO 9177-2:2022
2022 06 01
Mechanical pencils for technical drawings — Part 2: Black leads — Classification and dimensions
Norm
↖
ISO 9177-2:1989
1989 03 16
Mechanical pencils — Part 2: Black leads — Classification and dimensions
Norm
