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Norm
ISO 9177-2:1989
Issue date: 1989 03 16
Mechanical pencils — Part 2: Black leads — Classification and dimensions
Two types are available, black leads in which the binding agent is an organic polymer (designated by the letter "P"), and black leads in which the binding agent is clay (...
Withdrawn: 2022 06 01
Publisher:
International Organization for Standardization
Format:
Digital | 2 Pages
Language:
English
Currently valid:
Topics
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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
Two types are available, black leads in which the binding agent is an organic polymer (designated by the letter "P"), and black leads in which the binding agent is clay (designated by the letter "C"). Classification is made according to the degree of hardness. Part 1 deals with the classification, dimensions, performance requirements and testing.
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
↖
Norm
Issue date :
2022 06 01
Mechanical pencils for technical drawings — Part 2: Black leads — Classification and dimensions
