: The standard defines the correlation between the tolerance zone of the limit gauge and the tolerance of the workpiece, which varies based on whether the nominal size is above or below 180 mm. Where to Access

: Another reliable source for purchasing the 1997 English translation in PDF format. Related Standards

To ensure durability and usability, JIS B 7420 mandates specific design features:

The standard, officially titled "Plain Limit Gauges," is a Japanese Industrial Standard (JIS) that specifies the requirements for dimensional inspection tools used for holes and shafts. It provides the technical basis for ensuring that parts manufactured for machinery and precision equipment fall within their specified tolerance zones. Scope and Application