This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. JIS B 7420 - Standards - Afnor EDITIONS
The standard defines several key types of gauges used in inspection:
JIS B 7420 specifies the shapes, dimensions, and inspection methods for limit gauges used to check ISO metric screw threads and parallel pipe threads. The standard ensures that male threads (bolts) and female threads (nuts) fit together perfectly without binding or excessive play. The Purpose of Limit Gauges
The JIS B 7420 standard outlines several key requirements for the calibration and verification of non-automatic weighing instruments, including: jis b 7420 pdf
A common resource for international technical standards . JIS B 7420 PDF - Technical Standards Store
The official PDF can be obtained from several authorized standards retailers. Prices listed are subject to change, but here are the primary sources:
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As of late 2025 and early 2026, there is no public information indicating that JIS B 7420 is currently under revision or has been superseded. A list of new and revised standards published in December 2025 by Japan's Ministry of Economy, Trade and Industry (METI) does not include JIS B 7420. Therefore, for the foreseeable future, JIS B 7420:1997 remains the definitive reference for plain limit gauges in Japan. However, users should always check the official JIS web portal or contact the JSA to confirm the latest status before undertaking a major project.
This standard is essential for anyone working with:
Plug gauges assembled by fitting a tapered part into the handle. Trilock Type: A robust assembly type for larger gauges. Why You Need the JIS B 7420 PDF Can’t copy the link right now
For instance, a search result from appears to mislabel JIS B 7420 as a standard for grooved pan head machine screws, which is entirely incorrect. This example highlights the risk of using unverified sources for critical technical documents.
If you're interested in learning more about Jis B 7420 or torque wrenches, here are some useful blog posts:
: Applies to workpieces not exceeding 500 mm .
is the Japanese Industrial Standard for Plain Limit Gauges . This standard specifies the design, dimensions, and tolerances for gauges used to check the dimensional limits of cylindrical workpieces (shafts and holes). Key Technical Aspects
The standard covers the calibration, verification, and testing of these instruments to ensure they meet the required accuracy and performance standards.