: Circular gauges used to check the outside diameter of shafts.
: The complete, authoritative document is available for download at the Japanese Standards Association (JSA) Webdesk or through retailers like ANSI Webstore . Related Standards If you are working with threaded parts, you may also need: JIS-B-7420-1997-en.pdf - NormSplash jis b 7420 pdf
These check the Least Material Limit (LML) . As the name suggests, these should not fit the workpiece if it is within tolerance. : Circular gauges used to check the outside
For proper access to genuine JIS standards, always use the official (Japanese Standards Association) or national standards bodies like ANSI, DIN, or BSI. PDFs from unauthorized sites may be outdated, incorrect, or violate copyright. As the name suggests, these should not fit
Using JIS B 7420 ensures that manufacturers and clients are on the same page regarding acceptance or rejection criteria. How to Access the Full Standard