第一工業 List of Products and Services

The SSOO nut is a "heat press-in type insert nut (outsert nut)" that achieves high "torque resistance performance" and "pull-out strength." It prevents the nut from rotating (spinning) or pulling out during high torque tightening, ensuring safe fastening of resin products. The SSOO nut has solved various problems for our customers. 【Case 1】 - High tightening torque is required, but the insert nut spins. → It meets tightening requirements with high torque resistance performance, fastening resin components without spinning. 【Case 2】 - To reduce weight, we want to decrease the number of screws used. → It achieves a reduction in the number of screws used with high pull-out strength while ensuring fastening strength. Additionally, it has realized many benefits such as reducing environmental impact and responding to strong vibrations. For more details, please refer to the "SSOO Nut Adoption Case Collection." If you are struggling with fastening resin at high torque, please take a look at the materials. You will understand why we were able to develop the original SSOO nut that can handle high torque tightening. Please check it out from the link.

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Many "screw products" such as bolts and nuts are manufactured using "forging." "Forging" is a processing method that uses molds to shape metal materials by compressing them. It has many advantages, such as good yield, suitability for mass production, and increased strength due to work hardening. Although both are "screw products," bolts and nuts differ in materials, manufacturing processes, and manufacturing equipment. At Daiichi Kogyo, as a specialized group that manufactures both bolts and nuts, we have accumulated production and manufacturing technologies that correspond to each of these differences. We also utilize FEM analysis to conduct forging simulations, which are applied in process design and mold design. The reason we can manufacture both bolts and nuts can be found in the link below: "Production and Manufacturing Technology of the Specialized Group." A specialized group that manufactures both bolts and nuts has compiled "Basic Knowledge of Forging." We provide a clear explanation of the actual processing steps with accompanying photographs. Improvement examples utilizing FEM analysis are also included. Please download and take a look.

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Daiichi Kogyo is a specialized group that develops and manufactures fastening components, including bolts and nuts. 【What a specialized group can do】 While "forging" is the common method for screw manufacturing, "cutting" is also an important processing technique for screw production when complex shapes or additional processes like drilling are required. Daiichi Kogyo possesses the manufacturing know-how necessary for "forging," "cutting," and "welding" in screw production. We can perform "composite processing" that combines these techniques. Forging + Cutting + Welding ⇒ Composite products With the accumulation of each processing technique, we can set up processes that leverage the characteristics of each method. 【Manufacturing Example】Production of parts with strict precision requirements. ● When manufactured using only "forging," the load on the mold increases, raising concerns about mold lifespan and quality deterioration. ↓ ● By switching from "forging" to "cutting" for manufacturing, we can reduce the load on the mold and lower forging costs, achieving quality improvement as well. For more details, please visit the following 【Daiichi Kogyo Co., Ltd. Fastener Division Fastening Components Site】. We are currently offering free technical materials that provide basic knowledge of screw manufacturing techniques, including "cutting and welding." Please download and take a look.

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"Welding processing" refers to a method of joining two objects together. It involves melting the joint area of two materials to join them, or adding melted material from an external source to the joint area to connect the two objects. We manufacture cap nuts using "projection welding," a type of pressure welding. We also produce parts by welding stainless steel plates using "TIG welding," a type of fusion welding. We provide clear explanations of the advantages and disadvantages of each welding process, along with examples of manufacturing accompanied by photographs. We would like to introduce our company's screw manufacturing technology, "welding processing." We explain the welding methods and characteristics we employ, complete with photographs. You can gain a basic understanding of "welding processing." Please take a look. We also have materials that showcase examples of improvements in our welding processing operations. You can view the example materials here. URL:

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"Cutting processing" is a method of machining that shapes materials by cutting them with cutting tools to achieve the desired form. While "forging processing" is commonly used for screw manufacturing, "cutting processing" is also an important machining technique in screw production, especially when complex shapes or additional operations like drilling are required. At Daiichi Kogyo, we manufacture a variety of products, including aluminum nuts, stainless steel nuts, front bosses, and bushes, through "cutting processing." We also possess technical know-how for "forging processing" and "welding processing," allowing us to produce composite machined products that combine these techniques. This document clearly explains the advantages and disadvantages of cutting processing, examples of screw manufacturing processes using cutting processing, and points of caution and countermeasures in cutting processing, all accompanied by photographs. You will gain a fundamental understanding of the screw manufacturing technique "cutting processing." Please download the PDF to view it. Additionally, we also introduce examples of cost reduction in our cutting processing. Please check it out through the related links. [Technical Document] Basics of Screw Manufacturing Technology [Cutting Edition] Daiichi Kogyo's Screw Manufacturing Technology URL: https://screw.daiichikogyo.co.jp/product/machining

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Metal screws, such as those made of iron, will corrode and rust due to electrochemical reactions after being molded for a while. Corrosion and rust can lead to poor appearance and reduced strength of the screws. To prevent such issues, surface treatment is applied to improve the rust and corrosion resistance of the screws. There are many types of surface treatment methods, each differing in functions such as corrosion resistance and appearance (color). It is necessary to choose the optimal surface treatment according to the purpose and usage environment. This document clearly explains the characteristics of commonly used surface treatments for screws: "Electrogalvanizing," "High Nickel Type - Zinc-Nickel Alloy Plating," and "GeometⓇ Treatment." It is a compact version that can be easily viewed. [Contents] ● Main types and overviews of surface treatments ● Surface treatments commonly used for screws For those who want to know more about surface treatments for resin fastening components, you can view more details here. [Technical Document] Understanding the Differences in Treatment Methods: 'Surface Treatment of Resin Fastening Screws' https://screw.daiichikogyo.co.jp/product/surface_treatment Please take a look.

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Daiichi Kogyo is a specialized group that develops and manufactures both bolts and nuts. Although they are both "fasteners," bolts and nuts differ in materials, processing methods, manufacturing equipment, and required performance. 【What a specialized group can do】 ● Consideration of optimal materials and shapes: The "development/design capability" of a specialized group 　→ Utilization of FEM analysis and knowledge of materials ● Evaluation and analysis of fasteners with data backup: The "evaluation capability" of a specialized group 　→ Performance evaluation from individual parts to actual machines ● Reduction of prototype lead time and mass production: The "production technology/manufacturing technology capability" of a specialized group 　→ In-house mold production and utilization of FEM analysis For more details, please visit the 【Daiichi Kogyo Co., Ltd. Fastener Division Fastening Parts Site】 below. "Useful information about fasteners" is also available. Please take a look. There is a "Textbook on Fasteners: Learning from the Basics" created by a specialized group in fasteners. - What are fasteners - The mechanism of how fasteners tighten - Fastener loosening - Fastener design You can understand the basic knowledge of fasteners. It is available for free. Please download and take a look.

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Are you struggling with "fastening of resin"? With resin, you can achieve fastening using "bolts + nuts" by utilizing dedicated screws. Dedicated screws include insert nuts and insert bolts that are embedded in the resin. In softer resins compared to iron, embedded bolts or nuts can rotate together, leading to deformation or breakage of the resin. Have you ever experienced deformation of resin products due to "nut rotation"? Our original development of dedicated screws for resin (Octa Lobular(R) series) features a special octagonal head shape that ensures high torque resistance and high pull-out strength. Even when tightened with high torque, it prevents "rotation" and "pull-out," protecting resin products. You can choose from various types of insert nuts (simultaneous molding type, press-fit type, and both with caps) and insert bolts (both simultaneous molding and post-embedding options) according to your specifications. If you're wondering, "What is an insert nut?" please refer to our technical document "Basic Knowledge of Insert Nuts." It clearly explains the usage of insert nuts and compatible resins, covering the "basics of insert nuts." You can view it via PDF download.

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"Forging processing" refers to a type of plastic processing that shapes metal materials using molds. Unlike cutting processes, it minimizes material waste and is suitable for mass production. At Daiichi Industry, we manufacture both "bolts" and "nuts" through "cold forging processing." This document includes the advantages and disadvantages of forging processing, as well as examples of the forming processes for bolts and nuts/colors. It also illustrates the differences in manufacturing methods for bolts and nuts with accompanying photos. Additionally, we present examples of improvements in mold design using FEM analysis. <Note> We have added "Types of Cold Forging Processing" to the document. It explains how screws are formed using dies and punches, accompanied by illustrations. For more details, please refer to the download. Feel free to contact us with any inquiries.

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Screws are small components, but they play a significant role as functional parts in "fastening." Performance evaluation is essential to shape our customers' requests. For example, we have a series of screws designed for special octagonal shapes in resin. The starting point was a customer's request for a nut that wouldn't rotate when embedded in resin. Using FEM analysis, we selected the optimal shape from 40 different designs. Collaborating with the production technology and manufacturing departments, we developed an insert nut that can withstand high torque fastening. To turn requests into reality, it is necessary to have evaluation capabilities to ensure proposed performance. During the development stage, we need to consider performance requirements and mass production feasibility, and after development, we must confirm the design performance and mass production quality, among various evaluations. Our company is equipped with various testing and evaluation facilities, including those developed in collaboration with academia. You can understand the basics of screw performance evaluation, including what kind of equipment is used and what evaluations are conducted. We also provide actual evaluation examples. Please take a look at our development and evaluation tests to shape our customers' requests. More details can be downloaded, and feel free to contact us with any inquiries.

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Are you having trouble with fastening resin? When tightened with high torque, the resin can crack. It can spin, making it impossible to apply high torque, and the screw may come loose. We have a series of screws for resin that can solve these issues. Thanks to the special octagonal shape, the spinning torque is 1.8 times that of knurled products (31.0 Nm). The pull-out strength is 1.2 times greater (2713 N) (resin material: PP). This series of screws for resin allows for high torque tightening without damaging the resin. We offer both simultaneous molding and post-filling types, as well as nuts and bolts. Being made of steel, they are more cost-effective compared to brass materials. Not only is the material price itself low, but the ease of obtaining the material and compliance with RoHS directives are also not an issue. We have received numerous inquiries from customers facing difficulties with the availability and rising prices of brass materials. We also have technical documentation summarizing the results of verification tests on spinning torque and pull-out load. You can also download helpful technical materials that explain the basics of insert nuts.

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SSOO nut, a high-torque press-fit insert nut with a special octagonal shape that can be fastened without damaging the resin. With high torque resistance and pull-out strength, it not only satisfies customer requirements but also contributes to weight reduction and cost reduction by decreasing the number of parts and labor hours. 【Contributing to weight reduction and cost savings!】 ■ Case 1: Electric equipment case for EV vehicles <Effect> Reduced the number of screw parts from 23 per unit to 19 per unit, achieving cost savings. The nut alone contributes to a weight reduction of 20g per unit! ■ Case 2: Hydrogen discharge parts for FCV <Effect> Reduced the number of screw parts from 6 per unit to 4 per unit, achieving cost savings. A weight reduction of 8g, approximately 17%! ■ Case 3: Automotive filter parts (new plant-based resin material) <Effect> Reduced the number of screw parts from 3 per unit to 2 per unit, achieving cost savings. A weight reduction of 4g (approximately 17%)! 【Protecting the resin without loosening or spinning!】 ■ Case 1: Fastening the handle and body of a chainsaw [Satisfaction] The nut spun due to significant vibration during use. Only the SSOO nut satisfied the high torque fastening requirements. It protects the resin and does not spin. For more details on the cases, please feel free to contact us. You can view technical materials, including test results for spinning torque and pull-out strength, available for download.

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Are you having trouble with fastening resin? Parts like "color bush spacers" are helpful components for resin. Small metal parts play a role in protecting the resin and adding functionality. Soft materials like resin can crack or deform when tightened with high torque, leading to loosening of the fastening. For lightweight resin functional parts, metal collars to reinforce the fastening area are essential. By embedding collars into the soft resin material, we protect against cracking and deformation during fastening. Additionally, we add a metal touch to the resin, enhancing its functionality to prevent loosening. As a specialist in screws that manufactures both bolts and nuts, we offer suitable component suggestions. We have collars with knurling on the outer circumference to prevent disengagement. Originally, the design included knurling plus horizontal grooves. Upon reviewing the fastening assembly, we determined that knurling alone would suffice for disengagement prevention and proposed this to our customer, reducing the machining costs for the horizontal grooves. We handle a variety of collars in different materials, shapes, and types. We also respond to technical inquiries. Please feel free to consult us about any shape.

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Are you familiar with "delayed fracture of screws"? "Delayed fracture" refers to the phenomenon where a static stress (tensile or bending load) is applied at room temperature for a certain period of time, and then it suddenly fractures without any apparent plastic deformation. Despite the absence of large or repeated loads, the bolt suddenly fails... It might be due to delayed fracture. In fact, the mechanism behind "delayed fracture" has not been fully elucidated. The phenomenon of hydrogen embrittlement is considered to be an important factor. - What is delayed fracture? What are its testing methods? - What is hydrogen embrittlement? What are the countermeasures? This is a technical document that provides a basic understanding of these topics. Please refer to the PDF for more details. As a specialist in manufacturing both bolts and nuts, our company conducts performance testing and evaluation from the development stage at our R&D center to ensure that we meet our customers' performance requirements. We are also available for technical consultations. Please feel free to reach out to us.

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The high-torque compatible embedded bolt "SSOO Bolt" features a special octagonal head shape that prevents slipping, protecting the resin from damage and enabling tightening at high torque. This document is a technical report that includes experimental results such as torque strength tests and pull-out load tests for the SSOO Bolt, as well as specifications and other technical information. ● Usable for both insert during molding and outsert after molding The method of inserting the bolt can be adapted to suit the application. ● Since the bolt can be used in an upright position in the resin, the assembly of parts is also improved. For detailed technical information, please refer to the download.

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Steel is widely used as a material for screws because it is inexpensive, readily available, and strong. The main types of steel used for screws include carbon steel, which is primarily composed of iron and carbon, and alloy steel, which has elements such as chromium and molybdenum added. When strength and corrosion resistance are required for screws, the chemical composition of the steel can be altered, processing methods can be changed, or heat treatment can be applied to modify the material's mechanical properties. By utilizing the characteristics of the materials, various steel screws are produced to suit different applications and purposes. This document provides a clear explanation of the types and characteristics of steel materials suitable for screw processing methods and applications, as well as the strength classifications of steel screws, offering fundamental knowledge about steel materials for screws. *If you would like to learn more about steel materials for screws, please feel free to check the PDF document. Do not hesitate to contact us with any inquiries.*

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Metal components such as "collars" are used in fastening soft materials like resin to prevent buckling and cracking of the material. For example, inserting a metal collar into a resin hole and fastening it with a bolt helps prevent buckling, sinking, and cracking. Daiichi Kogyo manufactures various types, shapes, and materials of collars, bushes, spacers, and more. We offer a variety of shapes, including cylindrical and flanged types. Please feel free to inquire about any shape you need. As specialists in manufacturing bolts and nuts, we can suggest parts tailored to your requirements. We welcome your consultation. We manufacture and sell products tailored to customer needs in Japan, China, and India. Please feel free to contact us for details regarding materials, delivery times, prices, and more.

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Are you having trouble with fastening resin products? You want to tighten them strongly, but the resin cracks. Conventional fastening designs can't be used. You can bond with resin clips or adhesives, but it's a problem if they can't be removed... We have a solution for such "troubles": "screws for insert molding." "What are screws for insert molding?" We offer a technical document that answers that question for free. An insert nut is one type of screw for insert molding. By embedding it in the resin and reinforcing the fastening part, it enables fastening of resin using "bolt + nut." We clearly explain why insert nuts are necessary, how to use them, and the types of resins used, covering the "basics of insert nuts." Our company manufactures the "Octa Lobular Series," screws specifically for fastening resin products. With a special octagonal head shape, it ensures 1.8 times the torque resistance and pull-out strength compared to knurled products, protecting the resin and achieving high-torque fastening. We solve the "troubles" of fastening resin. Please check the detailed documentation of the series available for download. We also have a wide variety of colors for resin. Feel free to contact us with any inquiries.

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Screws are the fundamental mechanical elements that "connect things." They are utilized in various fields, including automobiles, buildings, computers, robots, as well as in asteroid exploration and medical applications. It is said that screws are so common that they can be found "within a radius of 1 meter." Do you know what types of screws exist? You can easily find out by looking at Screw Textbook Vol. 1 [Basic Terms and Types]. Do you know why screws tighten? Screw Textbook Vol. 2 [The Mechanism of Screw Tightening] explains it clearly with illustrations. Do you know why screws loosen? Screw Textbook Vol. 3 [Loosening and Countermeasures] provides a detailed explanation of the mechanisms behind screw loosening and preventive measures. Are you familiar with screw fastening design? Screw Textbook Vol. 4 [Screw Design Part 1] offers an easy-to-understand explanation of the fundamental knowledge necessary for screw fastening design. If you want to learn about screws from the basics, please refer to the PDF materials. Feel free to contact us with any inquiries.

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【High-Performance Bolt Feature】High-performance bolts can also be used for cost reduction! Case studies available. ■High-Strength Aluminum Bolts - Lightweight and strong. Contributes to weight reduction and improves fuel efficiency. - Can be used in aluminum products without the need for recycling separation. Reduces recycling costs. - Used in aluminum frames of the same material, achieving labor reduction and realizing cost reduction. ■High-Strength Stainless Steel Bolts - Despite being made of SUS304 material, ensures a higher strength (A2-90) through a special manufacturing process. - Achieved cost reduction by replacing with SUS304CUN material bolts. ■High Torque Compatible Insert Bolts (Outsert Bolts) - Bolts for resin that are embedded in resin parts. With high torque resistance, they do not rotate and protect the resin from damage. - With torque resistance and pull-out strength, it is possible to reduce the number of fasteners. Contributes to weight reduction and cost reduction. - Since back-filling (outsert) is also possible, it enables labor reduction and cost reduction. Detailed materials such as technical documents for each bolt can be viewed from the download section. Please feel free to contact us for case studies on cost reduction.

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We are widely contributing from automobiles to buildings! [Featured High-Performance Nuts with Proven Results] ■ Bag Nuts (Cap Nuts): Running all over the world! - A wide range of sizes from automobiles to buildings (M3~M36). - The cap at the tip ensures safety and enhances appearance. - The first JIS 3 type cap nut manufactured and sold in Japan. Available in cutting-edge titanium material. ■ High Torque Compatible Insert Nuts (Outsert Nuts): Achieved cost reduction and weight reduction! - Adopted for resin parts in next-generation vehicles (electric vehicles and hydrogen vehicles). - High torque resistance allows for a reduction in the number of fasteners, achieving cost savings. - Contributes to the lightweight of components. ■ Lock Nuts (3-Blade Type): Used for disaster prevention supplies because they do not loosen! - Meets safety requirements for vibration dampers and highway sound barriers. - Protects people with nursing beds. - Widely applicable to transportation equipment such as automobiles and motorcycles, as well as buildings. Technical documents and detailed information for each nut can be viewed from downloads. Please feel free to contact us for case studies and proven results.

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The "SSOO Nut PLUS" adds a cap to the reliable outsert nut, the SSOO Nut! It is a new insert nut from the Octa Lobular(R) series. <Are you having trouble fastening resin parts?> With the SSOO Nut PLUS, you can ensure the high torque resistance and pull-out strength of the "non-rotating" SSOO Nut. It solves the fastening issues of resin parts! 【Features】 ■ High torque resistance performance 1.8 times that of knurled products, preventing slipping and co-rotation even when tightened with high torque. ■ High pull-out strength 1.2 times that of knurled products, also excellent in vibration resistance. ■ Adds a horizontal cap to the SSOO Nut! - Can be used with simultaneous molding, making it suitable for thermosetting resins. - The cap prevents resin from wrapping around, ensuring secure fastening. - The horizontal cap can be used in space-constrained battery parts and resin components. - Prevents loosening by ensuring metal contact. It can be used as either an insert or an outsert, allowing you to choose specifications according to your application. *For more details, please refer to the materials available for download in PDF format or feel free to contact us.

• Work tools

The "SSOO Bolt" is a high-torque embedded bolt (insert bolt) designed for resin that minimizes deformation and rotation of the resin when tightened with high torque, and is also resistant to pull-out. This bolt is embedded in the resin component with its head, and is secured with a nut. Since the male thread of the bolt stands above the resin, it improves the assembly characteristics of the components. It has been successfully used in the junction boxes and busbars of the traction motor system "e-Axle." Please feel free to contact us if you would like a sample. 【Features】 ■ Minimizes deformation and rotation of the resin when tightened with high torque, and is resistant to pull-out ■ Improved assembly characteristics due to the standing threads of the bolt ■ The special octagonal shape of the head and the serrated grooves on the outer circumference allow the resin to easily engage when embedded ■ Can be embedded either through simultaneous molding or post-insertion via thermal press fitting ■ The shape of the bolt head has been modified for weight reduction *For more details, please refer to the PDF document or feel free to contact us. *Thread sizes range from M4 to M8. Please consult us regarding the length.

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The "SSOO Bolt" is a resin embedded bolt (insert bolt) with a special octagonal head shape, offering excellent torque resistance and pull-out strength. An insert bolt is a bolt that is embedded in resin and fastened with a nut. By tightening with a nut, it allows for the fastening of resin parts to each other or resin parts to metal. It minimizes deformation and cam-out of the resin when fastened with high torque, enabling nut tightening at high torque levels. It can also be used for back embedding (thermal press fitting), making it suitable for shapes that cannot be integrally molded. Since the bolt can be used in an upright position within the resin, it improves the assembly of parts. The product design has been completely revamped, and sizes from M4 to M8 are now available. 【Features】 ● Special shape that minimizes cam-out and slip even when tightened with high torque ● Strong against pull-out, preventing deformation of resin parts ● Usable for both insert (simultaneous molding) and outsert (thermal press fitting) ● Mass production possible due to unique manufacturing methods ● Trusted Octa Lobular series *For more details, please refer to the materials. Feel free to contact us with any inquiries.

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The "SSOO Nut" features fine irregularities on the surface of the shaft to enhance torque resistance performance. It is a heat-pressed insert nut that achieves "difficulty in rotation" and "high pull-out strength." Even when tightened with high torque, it does not slip, preventing damage to resin products. Additionally, its excellent pull-out strength contributes to weight reduction by reducing the number of components. Available sizes include M4, M5, M6, and M8. 【Features】 ■ Shape designed to prevent slipping and rotation, protecting resin products from damage ■ Contributes to weight reduction through the reduction of components and downsizing ■ Torque strength and pull-out strength have been verified through testing ■ Proven track record as an automotive component *You can download PDF materials such as verification test data. For more details on specifications and pilot holes, please feel free to contact us.

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Insert nuts for resin (plastic) have traditionally utilized knurled, square, and hexagonal shapes, which have raised concerns about the nuts deforming the resin and spinning freely (slipping or idling) when bolts are tightened with high torque. As a result, we received strong requests from customers to develop insert nuts with shapes that can withstand high torque (high torque strength). We conducted research, development, and prototyping in-house and devised an original shape of insert nut that can handle high torque. It is designed for use during resin molding and also boasts excellent tensile strength (pull-out strength). 【Features】 - Strong nuts that prevent spinning (slipping or idling) and protect resin products from damage. - A unique octagonal shape that enables "high torque tightening," which has not been available before. - We have realized a shape that is difficult to spin, as requested by many customers. For more details, please contact us or download the catalog.

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The Octa Lobular series contributes to weight reduction! - It protects resin parts and enables high-torque fastening. - The special octagonal shape improves the pull-out strength from resin parts! It achieves safe fastening that is also resistant to vibrations. - With high torque resistance, it allows for a reduction in the number of parts and downsizing. The Octa Lobular series can contribute to cost reduction! - Made of iron, the material cost is one-fifth that of brass. - It is manufactured through forging, which offers excellent material yield. - The unevenness of the shaft part, which enhances torque resistance, is processed through rolling. Mass production is possible. We present the Octa Lobular series developed by a total fastener manufacturer that produces both nuts and bolts. *You can download PDF materials to view verification test data for each product, such as torque tests and pull-out load tests.

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The "high-strength, high-corrosion-resistant stainless steel bolt" is made from austenitic stainless steel based on SUS304 and exceeds the strength classification A2 standard values of JIS B 1054. Through a proprietary molding process (patent obtained), it has achieved strength without the need for heat treatment. 【Features】 - Uses high-corrosion-resistant austenitic stainless steels SUS304 and SUS316 - Achieves high strength by utilizing material strength and work hardening through forging - The proprietary Bausinger effect suppression processing method eliminates the need for strengthening heat treatment, reducing environmental impact - Maintains high corrosion resistance and shortens lead time due to the absence of heat treatment processes - The screw head shape adopts a hexalobular design that offers high torque transmission - Balances corrosion resistance and strength, with a proven track record for use in automotive components (Note) The Bausinger effect refers to the phenomenon where, after applying plastic deformation in one direction, applying a load in the opposite direction results in plastic deformation occurring at a lower stress than when a load is applied again in the same direction. If you are interested in fastening with stainless steel components, please feel free to contact us.

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The founder of Daiichi Kogyo Co., Ltd., Akira Suzuki, was the first in Japan to manufacture and sell a bag nut (JIS Type 3 cap nut) with a cap that is press-formed onto a nut. Since its release, it has received positive feedback for being lighter and more affordable compared to traditional cutting types, and it has evolved into a wide variety of forms to suit various applications. You can find it in places close to you, so please remember Daiichi Kogyo when you see it. 【Features】 ○ The head is hollow, making it lightweight and allowing male threads to be inserted to the tip of the cap, preventing exposure of the threaded part. ○ The design is smart and has excellent decorative qualities. ○ It is standardized and can be mass-produced. For more details, please contact us or download the catalog.

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The founder of Daiichi Kogyo Co., Ltd., Akira Suzuki, was the first in Japan to manufacture and sell a bag nut (JIS Type 3 cap nut) with a cap pressed onto a nut. Since its release, it has received positive feedback for being lighter and more affordable compared to traditional cutting types, and it has evolved into a wide variety of forms to suit various applications. From this bag nut series, we offer lightweight and highly corrosion-resistant titanium cap nuts. 【Features】 ○ Lightweight (titanium is about two-thirds the weight of iron and half the weight of copper) ○ Excellent corrosion resistance, chemical resistance, and heat resistance ○ Smart design with excellent decorative qualities ○ Standardized and suitable for mass production 【Standard Sizes】Hexagonal type: Compatible with sizes M6 to M12. *Some are made to order. For more details, please contact us or download the catalog.

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The founder of Daiichi Kogyo Co., Ltd., Akira Suzuki, was the first in Japan to manufacture and sell a bag nut (JIS Type 3 cap nut) with a cap formed by pressing onto a nut. Since its launch, it has received positive feedback for being lighter and more affordable compared to traditional cutting types, and it has evolved into a wide variety of forms to suit various applications. From this bag nut series, we offer the "SS-UFO Cap Nut," which can be tightened with a screwdriver. The "SS-UFO Cap Nut" is a special bag nut with recesses (such as a cross hole) in the cap part. Even in tight spaces where a wrench cannot be used, this "SS-UFO Cap Nut" can be tightened with just one screwdriver. Please consider it in cases where hex nuts are difficult to tighten due to design constraints, or when you want to improve workability in small and narrow spaces. There are two head shapes available: pan (cross hole) and truss (cross hole). For more details, please contact us or download the catalog.

• Joints between components

The "E-LOCK Nut" handled by Daiichi Industry features a three-blade design that enhances its anti-loosening function and possesses the strength to withstand repeated use. In the case of conventional two-blade products, one blade gets lodged in the thread valley, effectively resulting in a state of anti-loosening with only "one blade," leading to concerns about stability. However, this product's three-blade design effectively increases thread stability with "two blades." Additionally, durability tests under vibration showed no deformation in the three friction rings of this product, proving its ability to withstand repeated use due to the sustained effect of the springs. (Other manufacturers' nuts with high anti-loosening functions may experience deformation.) **Features** 1) The three-blade design provides a more stable anti-loosening effect compared to conventional products. 2) Prevents early detachment even if the tightening axial force decreases. 3) Strong and capable of withstanding repeated use. ★ This product is from Osaka Forming Co., Ltd. You can view the products handled by Osaka Forming through the link below.

• Other interior and exterior systems and units

Plastic deformation is applied to metals, and as the degree of deformation increases, work hardening is achieved, resulting in a higher yield point than the original metal. The metal exhibits strong resistance to loads in the direction of the work hardening, but the yield point against loads in the opposite direction decreases, making it easier to undergo plastic deformation at lower stress levels. This phenomenon is called the Bauschinger effect. Our company has developed and launched a molding process technology that suppresses the Bauschinger effect. This special molding process enables the production of bolts with mechanical properties without the need for heat treatment. Non-quenched, medium-strength bolts are products that secure a strength classification equivalent to 8.8 without heat treatment. The absence of heat treatment reduces environmental impact and shortens manufacturing lead times. From development to evaluation, our team of experts is here to assist with the optimal design of screws. Please feel free to reach out to us.

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Bolts are one of the essential mechanical components for fastening products and are used in various machine structures. Our company, as a total fastener manufacturer supporting Japanese industry, produces and sells a wide variety of bolt products, including high-strength bolts, flange bolts, washer-integrated bolts, welded bolts, riveted bolts, and serration bolts. We also have manufacturing and sales bases overseas, including in China and India, to meet our customers' needs. So far, we have developed and mass-produced stainless bolts made from stainless steel SUS304, achieving high strength and corrosion resistance without heat treatment, as well as aluminum bolts based on aluminum alloy A7050, which achieve high strength through a special strengthening process. If you are interested, please feel free to contact us.

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Nuts are one of the essential mechanical components for fastening products and are used in various machinery structures. Our company, as a total fastener manufacturer supporting Japanese industry, produces and sells a wide variety of bolt products, including hex nuts, hex flange nuts, weld nuts, wheel nuts, cap nuts, insert nuts, and outsert nuts. We also have manufacturing and sales bases overseas, including in China and India, to meet our customers' needs. We have developed original products such as the "hard-to-turn" insert nut "SSOI nut" for high torque applications and the "hard-to-turn and hard-to-remove" outsert nut "SSOO nut," which are now in mass production. If you are interested, please feel free to contact us.

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SSOO Nut PLUS adds a cap to the trusted SSOO insert nut! It enables insert compatibility. This is a new insert nut from the Octa Lobular(R) series! This document is a technical report that includes abundant test data such as tensile tests and torque strength tests for the SSOO Nut PLUS. ● High Torque Compatibility It ensures the torque resistance performance of the SSOO nut, which boasts 1.8 times the torque resistance compared to knurled products. It does not slip or rotate even when tightened with high torque. 【Verification Experiment】 Torque Strength Test (Material: PP): 31N·m (approximately 1.8 times improvement in turning torque compared to knurled products) Pull-Out Load Test (Material: PP): 2713N (approximately 1.2 times improvement in pull-out load compared to knurled products) ● Added Peace of Mind with Horizontal Cap! - The cap prevents resin from wrapping around, ensuring secure fastening. - The horizontal cap can be used in tight spaces. - Metal touch prevents loosening. It can be used as both an insert and an outsert, allowing you to choose specifications according to your application. For detailed technical information, please refer to the download.

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The SSOO nut is a high-spec insert nut that contributes to both "high torque compatibility" and "weight reduction." This document is a technical report that includes abundant test data such as tensile tests and torque strength tests for the SSOO nut, as well as usage records. ● High Torque Compatibility Thanks to its unique octagonal shape and the irregularities on the shaft, both torque strength and pull-out strength have been improved compared to conventional insert nuts. 【Verification Experiments】 Torque Strength Test (Material: PP): 31.0 N·m (80% improvement in turning torque compared to conventional products) Pull-Out Load Test (Material: PP): 2713 N (18% improvement in pull-out load compared to conventional products) ● Weight Reduction In applications for resin parts in transportation equipment such as automobiles, replacing conventional nuts with SSOO nuts has led to a reduction in the number of screw components and weight reduction. 【Adopted Resin Parts】 Hydrogen emission parts and intercooler parts in automobiles For detailed technical information, please refer to the download.

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The SSOI nut improves torque resistance performance by being molded into a special octagonal shape. It is an insert nut that achieves "difficulty in rotation" and "difficulty in removal," molded simultaneously during resin molding. This technical report presents abundant test data, including tensile tests and torque strength tests, as well as adoption results, explaining the excellent performance of the SSOI nut. ● "Difficulty in rotation" By molding into a special octagonal shape, the torque resistance performance has been significantly improved compared to conventional insert nuts. It prevents the nut from spinning freely (back spinning) during high-torque tightening. 【Verification Test Results】 Torque strength test results (Material: MC Nylon): 25N·m or more ● "Difficulty in removal" Designed for simultaneous use with resin molding, it has excellent tensile (pull-out) strength. It features high vibration resistance and high rotational torque, making it difficult to loosen. 【Verification Test Results】 Pull-out load test results (Material: MC Nylon): 8250N ● Shape As a non-through type, there is no need to worry about resin flowing into the screw hole. 【Adoption Examples】 Resin parts such as air cleaners and intake manifolds. *For detailed technical information, please refer to the download.

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The "high-strength, high-corrosion-resistant stainless steel bolt" is made from austenitic stainless steel materials SUS304 and SUS316, which excel in corrosion resistance. By utilizing forging processes to enhance material strength and work hardening, it surpasses the JISB1054 A2 standard values. 【Verification Experiment】 Stainless Steel Bolt Tensile Test (Size: M8 P1.25) ○ Tensile Strength: 1018.3 MPa ○ 0.2% Yield Strength: 854.6 MPa By introducing our self-developed Bauschinger effect suppression processing method into the manufacturing process, we have made it possible to secure strength without heat treatment. ○ It allows for strong processing without enhanced heat treatment, reducing environmental impact. ○ By eliminating the heat treatment process, lead time can be shortened. (※) The Bauschinger effect refers to the phenomenon where, after applying plastic deformation in one direction, applying a load in the opposite direction results in plastic deformation occurring at a lower stress than when a load is applied again in the same direction. This stainless steel bolt achieves both corrosion resistance and strength while also contributing to cost reduction. Detailed technical information is available in the technical report. Please download it to learn more.

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The "SSOO Nut" is a strong insert nut that prevents slippage (rotation and free spin) caused by bolt tightening, protecting plastic products from damage. It has achieved a reduction in bolt and nut costs by two-thirds and a 17% reduction in threaded parts. *Samples available in 4mm, 5mm, 6mm, and 8mm. 【Features】 ■ Prevents nut slippage (rotation and free spin) when tightened with high torque, protecting plastic products. ■ Potential for reducing the number of parts and downsizing threaded components. ■ If downsizing is possible, weight reduction is also achievable. *Samples are available. Please contact us for more details. *Product catalog and case studies on cost reduction can be viewed via PDF download.

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The SSOO nut is a heat-pressed insert nut (outsert nut) that achieves "difficulty in rotation" and "high pull-out strength." 【High Torque Compatibility】 Due to its special octagonal shape (Octa Lobular), it is resistant to free spinning and co-spinning, protecting resin components and allowing for high torque tightening. 【Difficult to Pull Out】 By providing unevenness on the shaft, pull-out strength is improved. It also has high vibration resistance, enabling a reduction in the number of components and weight savings. 【Cost】 Using a widely available material (SWCH10R), there is no need to worry about fluctuations in material costs. High-speed production through forging and rolling allows for cost-effective mass production. 【Usage Method】 Since it can be back-filled through heat pressing, it is easy to handle. This document provides detailed information about the features, specifications, and examples of the SSOO nut. If you are considering the use of insert nuts for resin, please take a look.

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This is an introduction to a case where the automotive parts that typically used six insert nuts were replaced with the "high-strength" SSOO nuts from Daiichi Kogyo (high torque compatible insert nuts), resulting in a reduction of the number of components to four. By reducing the number of insert nuts by "two," the number of bolts was also decreased, leading to a cost reduction of about two-thirds and a weight reduction of 17% for the threaded components. ■ We are currently offering free case study materials that demonstrate the effects of cost reduction and weight reduction! ■ *For more details, please view the PDF available for download.

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"Cheaper" even a little. "Lighter" even a little. The SSOO nut has contributed to cost reduction for EV vehicles with its performance. ■ High torque compatible heat-pressed insert nut (outsert nut) 'SSOO Nut' Application: Electric component cases for EV vehicles Number used: 19 pieces per unit Initially set usage number during the development stage: 23 pieces per unit. With the strong fastening power of the SSOO nut, we reduced the number from 23 to 19 while ensuring sealing performance. ● Achieved cost reduction Cost reduction was realized by reducing the number of components. - Cost reduction due to the reduction in the number of nuts - Cost reduction due to the reduction in the number of bolts - Cost reduction due to the reduction in tightening work hours ● Achieved weight reduction → Also effective for improving fuel efficiency of EV vehicles - Weight reduction of 20g per unit just from the nuts - When combined with bolts, achieved more than double the "lightness" - Space reduction for fasteners allows for miniaturization of parts → Further weight reduction is possible The SSOO nut has achieved high pull-out strength and torque resistance. For more details on the "required pull-out strength" and "required free rotation torque" of this case, please feel free to contact us.

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Here is a case study of the adoption of high-torque compatible insert nuts (SSOO nuts). Adoption location: Speaker cover parts of a car door Target resin: PP-TD30 (Polypropylene Talc 30%) [Challenges before introduction] - We were looking for an insert nut that could withstand high torque tightening. [Deciding factors for introduction] - After conducting comparative tests with products from other companies, the SSOO nut was adopted because it demonstrated the highest strength. [Effects after introduction] - Since it can withstand high torque tightening, there is no occurrence of nut spinning or loosening. *For more details, please refer to the technical report digest available for download or contact us directly.

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Here are some examples of adoption that contributed to weight reduction with the high pull-out strength of SSOO nuts. <Adoption Example 1> Adoption Location: Hydrogen discharge parts used in hydrogen fuel cell vehicles (4 SSOO nuts, M6 size, used per unit) Target Resin: PP-TD30 (Polypropylene Talc 30%) [Challenge] ■ To reduce the number of screw components for weight reduction (previously 6 per unit) [Solution] ■ High pull-out strength enabled the reduction of the number of components used [Effect] ■ Reduced the number of screw components to 4 per unit ■ Achieved a weight reduction of 8g (approximately 17%) for screws <Adoption Example 2> Adoption Location: Automotive filter components (2 SSOO nuts, M6 size, used) Target Resin: New material resin using plant-derived fibers (PP) [Challenge] ■ To reduce the number of screw components for weight reduction (previously 3) ■ Insufficient strength of the new material resin causes it to spin under the specified torque with conventional products [Solution] ■ High pull-out strength enabled the reduction of the number of components used ■ High torque resistance performance meets the specified torque requirements [Effect] ■ Reduced the number of screw components to 2 ■ Achieved a weight reduction of 4g (approximately 17%) for screws

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