由良産商株式会社　特販部　特販課 List of Products and Services

This product is a flat washer with a hardness classification of 300HV. It prevents the nut or bolt head from sinking into the joined material. It can be used when the hole diameter is larger than the bolt diameter or to stabilize the seating surface. It meets needs with a mill certificate and inspection report. The material used is S45C to S55C (domestic material), and it has undergone bright hardening and tempering heat treatment. 【Features】 ■ JIS B1256:2008 ■ Standard shape / Component grade A ■ Marked with engraving ■ Hardness classification of 300HV ■ Comes with a mill certificate and inspection report *For more details, please refer to the PDF document or feel free to contact us.

The "SUS CDW" is a serrated hexagonal spring washer. It supports axial force with spring reaction due to its dish spring shape. The wedge-shaped serration effectively suppresses the rotation of loosening. It has a wedge shape that is less likely to damage the joined parts, is made of SUS304 for high heat resistance, and can be used in high-temperature environments. 【Features】 - Supports axial force with spring reaction due to dish spring shape - Effectively suppresses the rotation of loosening with wedge-shaped serration - Wedge shape that is less likely to damage the joined parts - High heat resistance with SUS304, usable in high-temperature environments - Material: S50C to S70C, SUP10; Hardness: 40 to 48 HRC *For more details, please refer to the PDF document or feel free to contact us.