BS ISO 2904:2020

This standard BS ISO 2904:2020 ISO metric trapezoidal screw threads. Basic dimensions is classified in these ICS categories:

• 21.040.10 Metric screw threads

This document specifies the basic dimensions of ISO metric trapezoidal screw threads in accordance with ISO 2902. The values refer to the design profiles in accordance with ISO 2901.

This document is chiefly applicable to traversing threads for traversing motion on machines, tools, etc. It can also be used for fastening threads.