Surface treatment is black oxide coating/trivalent chromate! Suitable for use in areas where conventional iron products lack strength.
JIS B1180 Appendix - Incorporation of Spring Washers with Hex Bolts of Strength Class 10.9 The "P-2" spring washer and ISO flat washer "I-3" have introduced "trivalent chromate." This product incorporates spring washers with a hardness of 40-50 HRC and round washers made of S55C into SCM hex bolts, reducing the labor of incorporating spring washers and round washers, preventing forgetfulness in assembly, and making it suitable for use in areas where conventional iron products lack strength. 【Product Specifications (Bolt)】 ■ Strength Class: 10.9 ■ Material: Structural Alloy Steel (SCM) ■ Precision: JIS 6g *For more details, please refer to the PDF document or feel free to contact us.
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【Product Specifications (Washers)】 ■Spring Washer: Complies with JIS B1251 No. 2, but the inner and outer diameters are different. ■Flat Washer: Complies with JIS B1256-1978 polished round, but the inner diameter is different. *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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Yura Sangyo's Special Sales Department aims to contribute to the screw demand industry by ensuring that we can deliver "better screws" at "more reasonable prices" and "just in time" through our wholesale operations of screws and related products. We strive to excel in various business activities. 1. Abundant inventory: Over 50,000 items and more than 10,000 tons of stock. 2. Wide range of suppliers: Partnering with 250 domestic and international suppliers, including SPS Unbrako, which specializes in the aerospace sector. 3. Robust immediate delivery system: Quickly responding to customer needs from small lots. 4. Reliable quality control: Conducting thorough inspections and traceability from product arrival to delivery in a separate department from the wholesale division, while also handling engineering fasteners (bolts and nuts) based on customer advice and needs. The product lineup and business details are as follows. We primarily focus on made-to-order production and also handle some brand products from the wholesale division.