(Official Publisher) ANSI Webstore DIN Media Intertek Inform Comparison with ISO Standards
Accessing the official allows manufacturers and quality inspectors to:
Compliance with JIS B 7420 offers several benefits, including:
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Verifying that in-house manufactured gauges meet the Japanese Industrial Standard.
Here is the hard truth. Unlike some standards that have been legally released for public viewing, by the Japanese Standards Association (JSA) and other authorized resellers.
When you order a "Class 1, 10mm Go plug gauge" from a supplier like Mitutoyo, TOSOK, or EIS, what does "Class 1" mean? Without the JIS B 7420 standard, you are trusting the supplier blindly. With the PDF, you can verify the exact tolerances on the purchase order. (Official Publisher) ANSI Webstore DIN Media Intertek Inform
Used for quick external measurement checks during production. Internal Structure of the Document
Because JIS standards are copyrighted intellectual property, free public downloads of the complete text are rarely legal or accurate. To ensure your engineering data is correct and up to date, you should use official channels:
The standard covers the calibration, verification, and testing of these instruments to ensure they meet the required accuracy and performance standards. Unlike some standards that have been legally released
: Applies to standard dimensional tolerance grades IT6 to IT16 , as cross-referenced with JIS B 0401 .
Note: Always verify the revision year (e.g., JIS B 7420:1997 or subsequent updates) to ensure you are manufacturing to the latest compliance framework.
Fundamentally, the standard specifies the technical requirements for plain limit gauges. These are physical gauging tools used to inspect the dimensions of two critical types of machine parts: holes (e.g., the cavity inside a nut) and shafts (e.g., a bolt or pin). More specifically, the scope of the document is as follows:
JIS B 7420 outlines several critical parameters to ensure consistency and reliability across manufacturers.
When working with JIS B 7420, it is important to keep a few key points in mind: