Technical Information: About Screws
Detailed information on overall effective diameter, pitch error, and half-angle error (of the crest) is provided!
The "screw thread" consists of five main elements: outer diameter, effective diameter, root diameter, thread angle, and pitch. In this technical document, we provide detailed information on the "five main elements of screw threads," as well as "important effective diameters," "overall effective diameters," and "pitch errors." [Contents] ■ Five main elements of screw threads ■ Important effective diameters ■ Overall effective diameters ■ Pitch errors ■ Half-angle errors of the thread crest *For more details, please refer to the PDF document or feel free to contact us.
basic information
【Five Major Elements of Screws】 ■ External diameter of the male thread (diameter of the female thread valley) ■ Effective diameter (effective diameter of the female thread) ■ Diameter of the male thread valley (internal diameter of the female thread) ■ Thread angle ■ Pitch *For more details, please refer to the PDF document or feel free to contact us.
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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.