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Stainless steel (SUS) also has magnetic properties. When making SUS products after producing iron products, the magnetism may transfer. Since the magnetic properties can vary by lot, it is difficult to arrange for a "lot that preferably does not stick to magnets." For some products, it may be possible to procure SUS316 or SUS316L, which have lower magnetism, so please consult with us. *For more details, you can view them through the related links. For more information, please download the PDF or feel free to contact us.

There are. Depending on the presence of iron and the usage environment, it may rust. There are also stainless steels that are resistant to rust, so please feel free to contact us. Additionally, we have posted other frequently asked questions at the link below, so please take a look. *For detailed information, you can view it through the related links. For more details, please download the PDF or feel free to contact us.

Semus screws (integrated screws) are products that incorporate flat washers or spring washers into the screw. There are different types of Semus, and the naming and notation change depending on what is integrated. When requesting Semus, you will need to choose the type of head you prefer. *For more details, you can view the related links. For further information, please download the PDF or feel free to contact us.*

Originally, flat washers were created based on the international standard ISO 7089 to establish JIS B 1256. Although it remains JIS B 1256, the dimensions have gradually changed over the years, leading to the distinction between old and new versions. 【JIS B 1256: 1963】The so-called old JIS. If it is marked as "P=〇" in the SEMS, this refers to the dimensions of this flat washer. 【JIS B 1256: 1978】The so-called new JIS. Generally, it is often referred to as "ISO." In SEMS, it is marked as "I=〇." 【Old JIS B 1256: 1998, JIS B 1256: 2008】These versions are currently not circulating in the market. *For more details, please refer to the related links. For further information, feel free to download the PDF or contact us.

A half-thread refers to a product where the entire threaded section below the head is not threaded, and it does not mean "half is threaded." The length of the threaded section varies depending on the product and size. There is a calculation method used when you want to know the length of the threaded section. 【For hex bolts】 M(thread designation)x2+6 / For lengths of 130 or more: Mx2+12 / For lengths of 220 or more: Mx2+25 【For hex socket bolts (caps)】 Mx2+12 (caps are not related to length) (Example) For a half-thread hex bolt M10x60: 10x2+6=26, so the threaded section is approximately 26. *For more details, you can view the related links. For more information, please download the PDF or feel free to contact us.

This document is a technical material that explains the thread tolerances of the old JIS grades 1 to 3 and the new JIS. It focuses on the tolerances for M6 coarse thread bolts/taps, detailing the importance of thread tolerances and providing an overview of both the old and new JIS. It can be useful for ensuring the compatibility and assembly of threaded components. 【Contents (partial)】 ■ Importance of thread tolerances ■ Overview of old JIS thread tolerances ■ Overview of new JIS thread tolerances ■ Comparison of M6 coarse thread internal thread tolerances (taps) ■ Comparison of M6 coarse thread external thread tolerances (bolts) *For more details, please download the PDF or feel free to contact us.

This document is a training material that allows you to learn the essential knowledge of screws, bolts, and hexagon socket bolts in the assembly manufacturing industry. It provides clear explanations of the types and characteristics of screws, the names of their parts, the features of hexagon socket bolts, and strength classifications. It also covers applications in assembly manufacturing and how to read drawings. Please make use of it. 【Contents (partial)】 ■ What are screws, bolts, and hexagon socket bolts? ■ Applications of screws and bolts in assembly manufacturing: Learning through specific examples ■ How to read drawings: Interpreting screw standards ■ Screw selection: Choosing the right screw ■ Precautions for use: Preventing accidents *For more details, please download the PDF or feel free to contact us.