Detailed information on Yama wa P-class accuracy, JIS accuracy, standard grades, and oversized specifications!
This technical document introduces "the grades of internal threads and the grades of taps." It includes information on the effective diameter tolerance range of P-grade taps based on nominal diameter and pitch, as well as a comparison table of the effective diameter tolerance ranges for taps intended for the American market, P-grade Yamawa, and Unified internal thread grades. 【Contents (excerpt)】 ■ Yamawa P-grade precision ■ Effective diameter tolerance range of P-grade taps based on nominal diameter and pitch ■ JIS precision ■ Comparison table of effective diameter tolerance ranges for tap grades and internal thread grades ■ Standard grades and oversized, etc. *For more details, please refer to the PDF document or feel free to contact us.
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Since our founding in 1923, the YAMAWA Group has been dedicated to researching and developing the highest quality cutting tools—such as taps, dies, and center drills—to meet the ever-evolving technological needs of the market. Guided by the founding spirit of contributing to the progress and development of Japan’s machinery industry, we continue to pursue excellence as specialists in cutting tools. YAMAWA products are trusted across a wide range of industries, from space exploration and aerospace to automotive, shipbuilding, machine tools, home appliances, and IT-related sectors—both in Japan and worldwide. Staying true to our philosophy of providing “Reliable Screw Threads”, we constantly refine our technology and quality management systems. As Japan’s first tap manufacturer to obtain ISO 9001 certification, we take pride in our heritage while striving to advance innovation and deliver cutting tools that support manufacturing around the world.
