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Forging Technology Introduction DVD 【*Free Gift!】

Forging Technology Introduction DVD 【*Free Gift!】

Free DVD giveaway of "Forging Technology" from Teikoku Seiko, supporting social infrastructure!

Teikoku Seibou Co., Ltd. has both hot and cold forging equipment, utilizing the characteristics of each to manufacture standard bolts, as well as irregular bolts and special steel bolts, regardless of the lot size, and is supported by many companies as a fastener manufacturer. Furthermore, we are equipped with processing facilities that can carry out secondary processing of bolts consistently. We respond to various fastener needs. We are offering a DVD that introduces our forging technology for free. The DVD provides an overview of hot and cold forging technology. *Companies wishing to receive the "DVD" should contact us and indicate "DVD request." *For urgent matters or technical inquiries, please contact us directly through our website.

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Railway-related products: Rail screws

Railway-related products: Rail screws

We offer screws with high precision and strong threads produced by the hot rolling method!

At Teikoku Seibou, a leading company in rail fastening component manufacturing, we handle "rail screws." The intended uses are for fixing rails and fastening tie plates. We have cut threads to increase the pull-out resistance of the screws. With the spread of synthetic sleepers, there are often cases where screws with thinner shaft diameters or smaller head diameters are produced, and the shapes are changed depending on the usage location, compared to conventional rail screws. Once we receive your drawings, we will start with mold design and proceed to manufacturing, so please feel free to consult with us. 【Features】 ■ High-precision and strong threaded parts due to hot rolling method ■ Threads are cut to increase the pull-out resistance of the screws ■ JIS mark certification product (JIS E1109) *For more details, please refer to the PDF materials or feel free to contact us.

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Railway-related products: fastening bolts and switch bolts.

Railway-related products: fastening bolts and switch bolts.

Numerous chock bolts and various shaped bolts related to signals and electricity.

The bolts for railway switches (points) are manufactured using a hot forging system. A variety of chock bolts and various shaped bolts related to signals and electrical systems are produced using this hot forging system. We manufacture different types of screws, including metric screws and Whitworth screws (inch-based), according to your requests. Based on our outstanding technical capabilities, we also produce a variety of other items. *For urgent or emergency inquiries, or technical questions, please contact us directly through our website.

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Railway-related products: resin-coated bolts for electrical contact and anti-corrosion.

Railway-related products: resin-coated bolts for electrical contact and anti-corrosion.

Bolts treated with coatings such as nylon-based and epoxy-based.

Electrolytic corrosion is a phenomenon where metal rapidly dissolves due to the flow of electricity from natural phenomena on the surface of the metal. Iron structures are painted, and this paint contains a lot of zinc, which provides rust prevention effects. However, there are many areas of corrosion on bolts that have been treated with hot-dip galvanized coating, especially in places that experience repeated wetting and drying or have high humidity. To help address these issues, we also sell bolts that have been coated with nylon-based and epoxy-based treatments. *For urgent or emergency cases, or for technical inquiries, please contact us directly through our website.*

  • Natural paints (water-based, ink, etc.)
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Construction-related products high-strength hex bolts

Construction-related products high-strength hex bolts

High-strength hex bolts, which are active in construction such as steel frames and bridges, are also one of our main products.

High-strength hex bolts (M12 to M30), which are active in construction work such as steel frames and bridges, are one of our main products. High-strength hex bolts play an important role in supporting the construction industry of tomorrow as components for construction machinery. They are made from special steel materials such as low-carbon manganese, chromium, and boron steel, ensuring stable mechanical properties. We maintain stable quality through consistent production using advanced bolt forming equipment (for diameters of 27mm or less). Leveraging years of experience in 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 have a rich inventory of standard products and respond quickly to orders. *For urgent or emergency inquiries, or technical questions, please contact us directly through our website.

  • Work tools

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Construction-related products: Stainless steel high-strength hex bolts

Construction-related products: Stainless steel high-strength hex bolts

It has excellent design, corrosion resistance, and durability, and is widely used in various fields.

Stainless steel is excellent in design, corrosion resistance, and durability, and has been widely used in various fields for a long time. High-strength hex bolts used for stainless steel structural materials are regulated by JIS B1186 "Set of High-Strength Hex Bolts, Hex Nuts, and Flat Washers for Friction Joints." However, since the chemical composition of the material and the manufacturing method are not specified here, high-strength hex bolts made of stainless steel are manufactured based on the standards of the Stainless Steel Structural Engineering Association, SSBS301 "Set of High-Strength Hex Bolts, Hex Nuts, and Flat Washers for Structural Stainless Steel" (10T-SUS, 10-SUS, 35-SUS). *For urgent or emergency cases, or for technical inquiries, please contact us directly through our website.

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  • Structural Materials

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Construction-related products TM truss bolts (TM bolt)

Construction-related products TM truss bolts (TM bolt)

We can provide high quality, high strength, and corrosion-resistant treatment for bolts of various sizes.

TM truss bolts are used in the spherical joint sections of the TM spatial truss (by Taiyo Kogyo Co., Ltd.), which creates an ideal space without columns. TM bolts are made from chromium-molybdenum steel (SCM435) and nickel-chromium-molybdenum steel (SNCM439), and are heat-treated to achieve high strength using advanced heat treatment equipment. Additionally, they are specially treated for corrosion resistance to prevent delayed fracture. Teikoku Seibou Co., Ltd. can provide high-quality, high-strength, and corrosion-resistant treatment for bolts of various sizes (with a maximum neck length of 1,000 mm). *For urgent or emergency inquiries, or for technical questions, please contact us directly through our website.

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Large machinery, civil engineering, and ship-related products hex bolts (4.6 to 12.9)

Large machinery, civil engineering, and ship-related products hex bolts (4.6 to 12.9)

We can manufacture bolts of all sizes according to user needs.

There are two types of hexagon head bolts based on the width of the two flat sides: 1. Standard hexagon bolts (regular hexagon bolts), and 2. Small hexagon bolts (hexagon bolts with a head width smaller than that of standard ones). The applicable strength classifications are 4.6, 8.8, and 10.9. Teikoku Seiko Co., Ltd. can manufacture bolts of all sizes according to user needs. Additionally, since October 1993, Teikoku Seiko Co., Ltd. has been producing high-strength hexagon bolts with a diameter of 10.9 (JIS standard) using advanced heat treatment technology that leverages hot forging technology (with a maximum shank length of up to 1,000 mm). *For urgent or emergency inquiries, or technical questions, please contact us directly through our website.

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  • Joining and fastening materials

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Large machinery, civil engineering, and ship-related products stainless steel bolts

Large machinery, civil engineering, and ship-related products stainless steel bolts

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

The stainless steel bolts manufactured by Teikoku Seibou Co., Ltd. are produced based on years of accumulated technology and proven results. All products are made to order. The manufacturing process includes hot forging, solution treatment, NC cutting, thread rolling, and surface treatment, all carried out under strict quality control and with extensive experience in each stage. The range of thread rolling capabilities spans from small diameters to large diameters, meeting all kinds of needs (with a maximum neck length of up to 1,000mm). *For urgent or emergency inquiries, or for technical questions, please contact us directly through our website.

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Large machinery, civil engineering, and ship-related products; special products, irregular products, and wit screws.

Large machinery, civil engineering, and ship-related products; special products, irregular products, and wit screws.

With reliable technology and a trustworthy system, we have been dedicated to each and every task.

Teikoku Seibou Co., Ltd. has been dedicated to each task with reliable technology and a trustworthy system. Furthermore, in order to respond to the "next needs," we have established a system that leverages the characteristics of the hot and cold forging technologies we have cultivated up to today, allowing us to accommodate all kinds of orders. Whether it's standard bolts or irregular products and bolts, please feel free to reach out to us with any inquiries or requests for quotes, regardless of the quantity, including questions like "Can you make something like this?" or "Can it be produced more economically?" *For urgent cases or technical inquiries, please contact us directly through our website.

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Hex bolts for large machinery (4.6, 8.8, 10.9)

Hex bolts for large machinery (4.6, 8.8, 10.9)

High-strength heat treatment with advanced equipment! Hex bolts for large machinery.

The "Large Machine Hex Bolt" from Teikoku Seibou is a hex bolt made from chromium-molybdenum steel (SCM435, 440) and nickel-chromium-molybdenum steel (SNCM439). 【Features】 ◆ High strength due to quenching with advanced heat treatment equipment, ensuring stable quality ◆ Stable torque management during tightening is possible when combined with nuts ◆ The hex head bolts are available in two types based on the width of the two opposing sides: - Standard hex bolt (regular hex bolt) - Small hex bolt (hex bolt with a head width smaller than that of the standard hex bolt) - Applicable strength classifications are 4.6, 8.8, 10.9 *For urgent or emergency inquiries, or technical questions, please contact us through our website.

  • Joining and fastening materials

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Product Catalog: Types of Dog Nails

Product Catalog: Types of Dog Nails

For general sections, laying sections, and frozen sections! Fastening nails for sleepers.

The production of dog spikes has walked alongside Japan's long railway history. Even today, they are highly regarded both domestically and internationally for use in fastening rails for wooden and synthetic sleepers. "Dog spike (standard)" is defined by JIS and comes in general and N-rail types. The N-rail type "dog spike (round head)" is used for fastening sleepers in turnouts, expansion joints, and turnout-type plates, while the "dog spike (square head)" is also available for fastening sleepers in turnouts and expansion joints. 【Features】 ○ General use - The angle under the head is 13° ○ N-rail use - The angle under the head is 1:10 ○ Square head spike - The angle under the head is 1:6 - Designed considering the shortcomings of the round head spikes listed below *For urgent or emergency inquiries, please contact us through our website for technical questions.

  • Joints between components
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  • Road construction

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Product Catalog: Rail Screws

Product Catalog: Rail Screws

High fastening strength! Hard-to-loosen rail screws.

The "rail screw nail" is a screw that has been threaded to increase the resistance to pulling out nails. Its intended use is the same as that of dog nails, for fixing rails and tie plates. With the widespread use of synthetic sleepers, there are many cases where screws with thinner shaft diameters or smaller head diameters are produced, and the shape is changed depending on the application. Once we receive the drawings, our company will start with the design of the molds and proceed with manufacturing. 【Features】 ○ Provides a higher fastening strength to wood and synthetic sleepers, making it less likely to loosen ○ Features a high-precision and strong screw section due to the hot rolling method *For urgent or emergency inquiries, please contact us through our website for technical questions.

  • Joints between components
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Product Catalog: Hot-Dip Galvanized High Strength Bolts (F8T)

Product Catalog: Hot-Dip Galvanized High Strength Bolts (F8T)

High-strength bolts that are active in steel frame and bridge construction.

"Hot-dip galvanized high-strength bolts" are bolts used for construction machinery. High-strength hex bolts (M12 to M30), which are active in steel frame and bridge construction, are also one of our main products. We use special steel materials for high-strength hex bolts, such as low-carbon manganese, chromium, and boron steel, ensuring stable mechanical properties of the products. We have a rich inventory of standard products and will respond quickly to your orders. 【Features】 - Utilizing advanced equipment for bolt forming (φ27mm and below) for consistent production, ensuring stable quality. - Leveraging years of hot forging technology, we also manufacture large-diameter high-strength hex bolts (M33 to M76). - Mass production of products with stable quality through strict lot management (based on JIS B1186). *For urgent or emergency inquiries, please contact us through our website for technical questions.

  • Work tools

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Stainless steel hex bolt

Stainless steel hex bolt

It is manufactured under strict quality control 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. *In case of urgent or emergency inquiries, please contact us through our website for technical questions.

  • Joints between components

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