File:Counterbore symbol 001.svg

Summary
The counterbore symbol used on engineering drawings. Date: 29 December 2009 Author: W191 - I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.