Last Updated： Aggregation Period:Aug 27, 2025～Sep 23, 2025
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Aug 27, 2025～Sep 23, 2025
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Aug 27, 2025～Sep 23, 2025
This ranking is based on the number of page views on our site.
16～30 item / All 711 items
We have a strong performance and price advantage in various countries around the world, and we keep it in stock as a regular inventory item.
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With just a torque wrench, anyone can accurately tighten large diameter bolts!
"Super Bolt" is a product that allows you to tighten bolts with a diameter of over 1 meter using only hand tools. Even large-diameter bolts can be securely tightened with a torque wrench. You are freed from cumbersome tools and dangerous, inefficient work, and the working time can be significantly reduced with fewer people. [Features] ■ Anyone can accurately tighten large-diameter bolts using only a torque wrench ■ Eliminates dangerous tasks often associated with large-diameter bolts ■ No worries about seizing or galling during tightening, and no need for reaction force support *For more details, please refer to the related links or feel free to contact us.
Guaranteeing high strength of 12.9 even for large diameters of M22 and above! A lineup of over 1200 sizes from M3 to M36.
The "YFS(R) Hexagon Socket Bolt" is a product from one of the largest Taiwanese brands specializing in the manufacturing of high-strength bolts. Thanks to advanced quality control, we can guarantee a strength classification of 12.9 even for larger sizes of M22 and above. We offer a wide range of stock sizes from a minimum of M3 to a maximum of M36, allowing for the procurement of main sizes from a single company. 【Features】 ■ Price competitiveness due to one-stop production with one of the largest production volumes in the world ■ Guarantee of high strength of 12.9 even for diameters of M22 and above ■ A lineup of over 1200 sizes from M3 to M36 *For more details, please refer to the related links or feel free to contact us.
![[Case Study] Prevention of Foreign Matter Contamination in Food Manufacturing Lines and Reduction of Inspection Work](https://image.www.ipros.com/public/product/image/fe4/2000999158/IPROS32247241478205454787.png?w=280&h=280)
A case where Nord-Lock washers were proposed to prevent the loosening and falling out of screws.
Here is a case where we proposed the "Nord-Lock Washer" to a food processing manufacturer. In the final stage of packing the manufactured liquid, screws used in the equipment line fell off and were shipped without anyone noticing, resulting in contamination of the product. After our proposal, there have been no signs of screw detachment, and the emergency measure of inspection work has been eliminated, leading to a reduction in the burden on the workers. [Overview of the Issue] ■ Screws used in the equipment line fell off and were shipped while contaminating the product without anyone noticing. ■ The issue was discovered by chance during an inspection at a retail store, leading to a halt in production and a recall of all products. ■ Since then, all areas with potential for detachment have been addressed with emergency measures. ■ The inspection work before starting operations has become an excessive burden, so we want to implement a fundamental solution. *For more details, please refer to the related links or feel free to contact us.
![[Case Study] Reduction of Maintenance Frequency and Improvement of Quality through Anti-Loosening Measures](https://image.www.ipros.com/public/product/image/8fb/2000999178/IPROS67613640490611131511.png?w=280&h=280)
A case where Nord-Lock washers contributed to a reduction in maintenance frequency.
Here is a case where we proposed "Nord-Lock washers" to an industrial machinery manufacturer. They were using hex socket bolts (CAP) in their binding equipment, but there was an issue with loosening occurring after delivery. After our proposal, the reports of loosening troubles, which had been occurring almost every month, dropped to zero. [Overview of the Issue] ■ Hex socket bolts (CAP) are used in the binding equipment, but loosening occurs after delivery. ■ There were 2 to 3 reports per month, and maintenance was performed at the customer site each time. *For more details, please refer to the related links or feel free to contact us.
Excellent design, corrosion resistance, and durability! Stainless steel bolts that can be used widely.
Stainless steel is excellent in design, corrosion resistance, and durability, and has been widely used in various fields for a long time. At Teikoku Seibou, we manufacture "stainless bolts" based on years of accumulated technology and achievements. The range of rollable diameters is broad, from small to large sizes, catering to various needs (with a maximum neck length of 1,000mm possible). All products are made to order. 【Features】 ■ All products are made to order ■ Manufactured under strict quality control and extensive experience in all processes, including hot forging, solution treatment, NC cutting, thread rolling, and surface treatment ■ The range of rollable diameters is broad, from small to large sizes (with a maximum neck length of 1,000mm possible) *For more details, please refer to the PDF document or feel free to contact us.
JIS mark display system certified products! Introducing the dog nails and rail screws handled by our company.
At Teikoku Seibou, a leading company in rail fastening component manufacturing, we handle "dog spikes and rail screws." "Dog spikes" are used for fastening rails to wooden and synthetic sleepers. In addition to the commonly used standard dog spike "Dog Spike (Standard) JIS-E1108," we offer dog spikes (round head) and dog spikes (square head) in our lineup. "Rail screws" are used for fixing rails and fastening tie plates, and we provide types A, B, and C according to their applications. 【Features of Dog Spike (Standard)】 ■ Currently widely used standard dog spike ■ Available for general use and N rails (the difference is the angle under the head of the dog spike) ■ Certified product under the JIS mark display system (JIS E1108) *For more details, please refer to the PDF materials or feel free to contact us.
Improved reliability and workability due to prevention of loosening with high tightening force.
Hexagon socket bolts (caps) are generally used without being paired with nuts, so referring to them as screws is more accurate. However, since the name hexagon socket bolt has become widespread, they are also called cap bolts. The applicable strength grades are 8.8, 10.9, and 12.9. They are tightened with a hexagon rod wrench (with a maximum neck length of 1,000 mm). *In urgent or emergency cases, please direct any technical inquiries through our website.
Please feel free to consult us about standard bolts as well as irregular items and irregular bolts.
Special products, irregular products, and wit screws are equipped to respond to the "next needs" by leveraging the characteristics of the hot and cold forging technologies cultivated up to today, allowing us to accommodate all types of orders. In addition to standard bolts, we welcome inquiries and estimates for irregular products and irregular bolts, regardless of the quantity, such as "Can you make something like this?" or "Can it be produced more economically?" *For urgent or emergency cases, please contact us with technical questions through our website.
Two types are available depending on the size of the two-sided width! Stable torque management during tightening is also possible.
We would like to introduce our "Hex Bolts," which are heat-treated to high strength and possess stable quality. Hex head bolts come in two types based on the width across the flats. The applicable strength classifications are 4.6, 8.8, and 10.9. At Teikoku Seibyo, we can manufacture bolts in various sizes according to user needs. Additionally, since October 1993, our company has been producing high-strength hex bolts with a diameter of 10.9 (JIS standard) using advanced heat treatment technology that leverages hot forging techniques (with a maximum shank length of 1,000 mm). 【Features】 ■ Hex bolts (8.8, 10.9) are made from chromium-molybdenum steel (SCM435, 440) and nickel-chromium-molybdenum steel (SNCM439). ■ They are heat-treated to high strength using state-of-the-art heat treatment equipment, ensuring stable quality (8.8, 10.9). ■ When combined with nuts, they allow for stable torque management during tightening. ■ JIS mark certification (JIS B1180). *For more details, please refer to the PDF document or feel free to contact us.
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.
I want to fit the following needs: "21st Century Product Catalog"
At Teikoku Seibou Co., Ltd., we have been dedicated to each product with reliable technology and a trustworthy system. To further respond to the "next needs," we have developed a system that leverages the characteristics of both hot and cold forging technologies cultivated up to today, allowing us to accommodate orders for standard bolts as well as custom shapes and irregular bolts, regardless of the lot size. The "21st Century Product Catalog" includes not only "company history," "JIS approved items," "production steel materials," and "main production and inspection equipment," but also a wide range of products such as "10.9 high-strength bolts," "10.9 hex socket bolts," "dog nails and stop nails," "rail screws," "rail fastening bolts," "gauge adjustment fittings," and "joint plate bolts." *For urgent or emergency inquiries, or for technical questions, please contact us directly through our website.
Introduction of the business and product lineup!
At Teikoku Seibou Co., Ltd., we are dedicated to developing automated equipment for self-tapping screws and continuously striving to improve our technology, producing better products at lower costs, and receiving patronage from various sectors and fields. We have been manufacturing bolts, screws, and nails, which are essential for social infrastructure such as railways, construction, civil engineering, and shipbuilding, for nearly a century. With the motto "We want to meet the next needs," our entire company is united in contributing to society and advancing into the future as "Teikoku Seibou, an old yet new company." In our "Business Introduction," we sincerely respond to user needs with "technical capabilities" backed by solid technology and a robust system, high productivity utilizing years of knowledge and experience in "production systems," and "quality control" that provides peace of mind through rigorous inspections. Additionally, in the "Product Lineup Introduction," we feature a wide range of products including "dog nails," "gauge blocks," "long head studs," "SS bolts," "epoxy powder coating," "10.9 and 8.8 high-strength bolts," and "stainless steel hex socket bolts," among many others. *For urgent or emergency matters, or technical inquiries, please contact us directly through our website.
Would you like to use it for decoration? Please also make use of it as a souvenir.
The 'Dog Nail / Trapezoidal Screw' is shaped remarkably like a dog's head and can be widely used for various purposes. Please get creative with its use as an exterior decoration for buildings or as a hook for hanging items. If you would like to order it as a commemorative item, we can also include text or dates. 【Features】 ■ Can be used as an exterior decoration for buildings or as a hook for hanging items ■ Text and date engraving is also possible *For more details, please refer to the PDF document or feel free to contact us.
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.*
