Uses alloy steel and low-carbon boron steel for mechanical structures. Complies with JIS B 1051. Stable quality through in-house production.
Introducing the "High-Strength Hex Bolt" from Teikoku Seibou, a manufacturer of fastening components related to large machinery and railways. For strength grades "8.8" and "10.9," we use mechanical structural alloy steel (SCM435) and low-carbon boron steel as materials. We offer a lineup of 9 sizes: M16, M20, M22, M24, M27, M30, M33, M36, and M39. 【Features】 ■ High strength is achieved through heat treatment, ensuring stable quality. ■ When combined with nuts, stable torque management is possible during tightening. *For more details, please refer to the materials. Feel free to contact us with any inquiries.
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【Specifications】 ◎Material Machine structural alloy steel SCM435 Low carbon boron steel ◎Grade Mechanical properties: JIS B 1051 Strength classification 8.8・10.9 Screw grade: JIS B 0209 (Permissible limit dimensions and tolerances for metric coarse screws) Body 6g Finish level: Medium ◎Surface treatment: Black oxide coating ◎Lineup: M16・M20・M22・M24・M27・M30・M33・M36・M39 【Mechanical properties (8.8／10.9)】 ◎Minimum tensile strength: 8.8 (830N/mm2) / 10.9 (1040N/mm2) ◎Vickers hardness: 8.8 (255–335HV) / 10.9 (320–380HV) ◎Brinell hardness: 8.8 (242–318HB) / 10.9 (304–361HB) ◎Rockwell hardness: 8.8 (23–34HRC) / 10.9 (32–39HRC) ◎0.2% yield strength (minimum): 8.8 (660N/mm2) / 10.9 (940N/mm2) ◎Guaranteed load stress: 8.8 (600N/mm2) / 10.9 (830N/mm2) ◎Fracture elongation (minimum): 8.8 (12%) / 10.9 (9%) *For more details, please refer to the documentation.
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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.