Mill sheets and inspection certificates are also available! Prevents nuts and bolt heads from sinking into the joined materials.
We would like to introduce the "Flat Washer 300HV" handled by Sanwa Ai. It prevents the nut or bolt head from sinking into the joined material. When the hole diameter is larger than the bolt diameter, it can be used to stabilize the seating surface. Additionally, it has undergone quenching and tempering heat treatment. Please feel free to contact us when you need it. 【Features】 ■ JIS B 1256:2008 ■ Recommended combination with screw part strength classification 10.9 (JIS B 1061:2020) ■ Material: S45C to S55C (domestic material) ■ Marked with hardness classification 300HV ■ Mill sheet and inspection certificate available *For more details, please refer to the PDF document or feel free to contact us.
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Sanwa Ai is a trading company specializing in the research and development of screws. From a single screw among 50,000 items to custom-made products, we respond to our customers' needs with the technology and know-how we have cultivated over half a century.