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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
It is a target cross-sectional screw with a large proportion of the top of the mountain and the bottom of the valley.
Currently, OSG supports trapezoidal screw taps and gauges as special products.
Tr : Metric Keystone Screw JIS B 0216 0217
TM : 30° trapezoidal screw Conventional JIS
TW : 29° trapezoidal
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
Types of screws PS and PF Is it possible to share thread machining tools and gauges?
Both are parallel screws for pipes, but the tolerance settings are different.
Gauges cannot be shared with machining tools.
BA thread refers to the type of thread called BA in the British Standard BS, and the thread angle is 47.5 degrees.
For example, if size is "2BA", then 2 represents the size number.
The size of the pitch is determined by the size number, and in the case of the
