Cylindrical ring gages have a number of inspection purposes. They are used as Go/No-Go gages to inspect the outside diameter of a shaft or rod. They are masters for dial bore gages, internal micrometers and coordinate measuring machines (CMMs). 

The previous two columns dealt with a study of thread plug gage calibration, the results of which will be discussed and/or argued over for some time.

A highly common application for gages is inspecting threaded holes and shafts.

While most metrology markets are extremely challenged by the sluggish economy, the global gages market remains relatively well-positioned primarily due to its cost-effectiveness.