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It refers to the introduction of ISO grades in 1973.
Conventional JIS standards were operated as Japan's own standards with classifications of first, second, and third grades, but in response to the trend of eliminating industrial barriers and deregulation due to internationalization, we have introduced an overseas grading system into JIS.
ISO threads, sometimes referred
List of Thread Standards
A list of the standard numbers and symbols of the main screws is available in our Hole Thread Machining Tool Product Catalog.
However, detailed dimensions for each individual screw call are not listed. Please limit the size and contact us each time.
Parallel screws
In order to refer to JIS standards, it is common to refer mainly to the JIS Handbook. It can also be viewed at libraries.
Standards can be viewed via the Internet from the JISC " Japan Industrial Standards Committee website ".
(Please note that printing is
