ISO 9177-2:2022

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: — polymer leads (designated by the letter “P”); — ceramic leads (designated by the letter “C”).

OEN:

ISO

Langue:

English

Code(s) de l'ICS:

01.100.40; 97.180

Statut:

Publié

Date de Publication:

2022-05-31

Numéro Standard:

ISO 9177-2:2022