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”).

Edition	2022
Standard Part No	2
Published Date	2022
Published By	International Standardization Organisation
Page Count	4