bolt×帝国製鋲 - List of Manufacturers, Suppliers, Companies and Products

bolt Product List

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Stainless bolt

Stainless bolt

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.

  • Joining and fastening materials

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Railway-related products: dog spikes and rail screws.

Railway-related products: dog spikes and rail screws.

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.

  • Road construction

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Hexagon socket bolt (cap)

Hexagon socket bolt (cap)

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.

  • Joints between components

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Special items, irregular items, wit screws

Special items, irregular items, wit screws

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.

  • Subsidiary materials

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Hexagon bolt (4.6, 8.8, 10.9)

Hexagon bolt (4.6, 8.8, 10.9)

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.

  • Joining and fastening materials

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"High-strength hex bolt 8.8・10.9" JIS B 1180

"High-strength hex bolt 8.8・10.9" JIS B 1180

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.

  • Joints between components
  • Work tools

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Empire Fastener Co., Ltd. "21st Century Product Catalog"

Empire Fastener Co., Ltd. "21st Century Product Catalog"

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.

  • Steel
  • Secondary steel products
  • Work tools

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Imperial Fastener Co., Ltd. "Company Profile"

Imperial Fastener Co., Ltd. "Company Profile"

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.

  • Joints between components
  • Work tools
  • Road construction

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Railway-related products: dog spikes, trapezoidal screws, and other applications.

Railway-related products: dog spikes, trapezoidal screws, and other applications.

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.

  • Synthetic Resin Plywood
  • Flag hardware and decorative hardware
  • Road construction

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Construction-related products: hot-dip galvanized high-strength hex bolts

Construction-related products: hot-dip galvanized high-strength hex bolts

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.*

  • Safety and consumables
  • Rock drills, demolition machines, and excavators

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Hexagon socket bolts (caps) for large machinery, civil engineering, and shipbuilding-related products.

Hexagon socket bolts (caps) for large machinery, civil engineering, and shipbuilding-related products.

The compactness of the device has improved, and the design performance of the equipment has enhanced.

Hexagon socket head bolts are generally used without nuts, so the term "screw" is more accurate. However, since the name "hexagon socket bolt" has become widespread, they are also referred to as 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). This contributes to the compactness of the equipment, improves the design performance of the devices, allows for application in narrow spaces, and enhances workability. With high tightening force, it improves reliability by preventing loosening. *For urgent or emergency inquiries, or technical questions, please contact us directly through our website.

  • Safety and consumables

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Product Catalog: Hex Bolt (6.8)

Product Catalog: Hex Bolt (6.8)

Large bolts used for heavy machinery and construction equipment.

The "hex bolt (6.8)" is a bolt used in large machinery, civil engineering, and shipbuilding. Hex head bolts come in two types based on the width across the flats: standard hex bolts and small hex bolts. In addition to hex bolts (6.8), we also offer hex bolts (4.6, 8.8, 10.9, 12.9). Our company can manufacture bolts in various sizes according to user needs (with a maximum shank length of 1,000mm). 【Features】 ○ The quality is stable due to high-strength tempering with advanced heat treatment equipment. ○ Stable torque management during tightening is possible when combined with nuts. *For urgent or emergency inquiries, please contact us through our website for technical questions.

  • Joints between components
  • Work tools

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【Product Catalog】Hexagon Socket Bolt JIS B 1176

【Product Catalog】Hexagon Socket Bolt JIS B 1176

Prevents loosening with high clamping force! Bolts used in large machinery, civil engineering, and shipbuilding.

The "Hexagon Socket Bolt JISB1176" is a bolt used in large machinery, civil engineering, and shipbuilding. Hexagon socket head bolts are generally used without nuts. The applicable strength grades are 8.8, 10.9, and 12.9. They are tightened with a hexagon rod wrench (with a maximum shank length of 1,000mm). Our company has established a system to accommodate all orders by leveraging the characteristics of hot and cold forging technology. 【Features】 ○ Compact design of equipment ○ Improved design performance of devices ○ Application in narrow spaces and enhanced workability ○ Increased reliability by preventing loosening with high tightening force *For urgent or emergency inquiries, please contact us through our website for technical questions.

  • Joints between components
  • Work tools

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Construction-related products High-strength hex bolts

Construction-related products High-strength hex bolts

Construction-related products High-strength hex bolts

High-strength hex bolts (M12 to M30) actively used in steel frame and bridge construction 【Features】 - Coated with a surface treatment to prevent rust in highly corrosive environments such as coastal and offshore areas. - Made from special steel materials (developed by Sumitomo Metal Industries, Ltd.) for high-strength hex bolts, including low-carbon manganese, chromium, and boron steel, ensuring stable mechanical properties of the products. - Utilizing advanced equipment for bolt forming (up to φ27mm), we conduct integrated production, ensuring stable quality. - Leveraging years of hot forging technology, we also manufacture large-diameter high-strength hex bolts (M33 to M76). We mass-produce products with stable quality through strict lot management based on JIS B1186. We maintain a large inventory of standard products and respond quickly to orders. *For urgent or emergency inquiries, please contact us through our website for technical questions.

  • Work tools

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Stainless steel bolt

Stainless steel bolt

It is manufactured under strict quality control and with extensive experience in all processes.

Stainless steel bolts are manufactured based on years of our accumulated technology and achievements. Additionally, there are processes such as hot forging, solution treatment, NC cutting, thread rolling, and surface treatment, all of which are carried out under strict quality control and with extensive experience. The range of rollable diameters is wide, from small to large, meeting all kinds of needs. *For urgent or emergency inquiries, please contact us through our website for technical questions.

  • Joints between components

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