We have undergone examination based on the Building Standards Act and obtained general certification from the Minister of Land, Infrastructure, Transport and Tourism.
The high-strength hex bolts with hot-dip galvanized coating from Teikoku Seibou Co., Ltd. have undergone examination based on the Building Standards Act regarding corrosion resistance, mechanical properties, tightening functionality, delayed fracture characteristics, and construction performance, and have obtained general certification from the Minister of Land, Infrastructure, Transport and Tourism. The coating weight of the bolts, nuts, and washers is 550g/m² or more. Furthermore, the coating weight of the components is managed under the same standards, ensuring maintenance-free corrosion resistance over the long term. In the zinc plating process, acid washing is avoided as much as possible to prevent hydrogen intrusion, eliminating concerns about delayed fracture. The nuts are treated with a special lubrication process, guaranteeing stable axial force during tightening construction using the nut rotation angle method. *For urgent or emergency cases, or for technical inquiries, please contact us directly through our website.*
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【Features】 ○ Obtained general certification from the Minister of Land, Infrastructure, Transport and Tourism ○ Coating weight of bolts, nuts, and washers is 550g/m2 or more ○ Exhibits corrosion resistance performance maintenance-free for a long period ○ In the zinc plating process, avoids pickling as much as possible to prevent hydrogen ingress ○ No concerns about delayed fracture ○ Special lubrication treatment applied to nuts ○ Guarantees stable axial force in tightening construction using the nut rotation angle method ● For more details, please contact us. There is an inquiry form at the link.
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The fusion of ancient techniques and modern technologies. Believing that "years of experience lead to great creativity," we have adopted the slogan "We want to meet the next needs" and aim to advance as a company capable of creation, production, and research. Your information, suggestions, questions, and requests will guide us toward further growth. We aspire to be a company that thinks and creates together with our customers, so please feel free to contact us with anything.