A plain plug gauge is a simple, fixed gauge used to check the diameter of a hole, ensuring it falls within acceptable tolerances. It's essentially a pin with a specific diameter, designed to either enter a hole if it's large enough (GO gauge) or not enter if it's too small (NO-GO gauge).

Limit Plain Gauge, A reliable tool used to measure and check the size of components with precision. It is ideal for ensuring parts meet required dimensional standards. Simple to use and suitable for a variety of applications in quality control and manufacturing.