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TONEJI Business Introduction

TONEJI Business Introduction

Transforming customer requests into tangible forms through creativity is our business.

TONEJI Co., Ltd. not only provides traditional fastener products such as bolts, nuts, and washers, but also assists customers in creating better products through the development and design of metal parts and value-added proposals to meet various demands in a diversifying society. Currently, we mainly manufacture and sell our unique brand products such as D-Lock, HugBolt, and T-LSB. We also engage in custom manufacturing and contract testing. Under the philosophy of "creating work that contributes to society," we will take on the mission of supplying safer, more convenient, and stable quality products with a new company name and structure. 【Business Activities】 - Provision of fastener products such as bolts, nuts, and washers - Development, design, and value-added proposals for metal parts - Contract performance testing using various testing machines For more details, please contact us or download our catalog.

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Shortened construction period and reduced construction costs: 2-piece set bolt 'D-LOCK'

Shortened construction period and reduced construction costs: 2-piece set bolt 'D-LOCK'

Achieved a significant increase in work speed compared to the conventional 5-piece structure! For the installation of architectural structures and the mounting of solar panel frameworks!

The "D-LOCK" is a newly conceived set bolt designed with a simple two-piece structure, incorporating functional components while considering workability on-site. With fewer parts, it is easy to handle and increases installation speed, making it easier to work even in limited spaces, thereby reducing the risk of dropping or losing components. It contributes to improved safety on-site and reduced construction costs. 【Features】 ■ Workable two-piece structure Compared to the conventional five-piece (B, N, Wx2, SW), the D-Lock adopts a two-piece structure. ■ Anti-rebound function and high workability The D-Lock employs a disc spring as an anti-rebound feature. ■ Bolts and nuts are domestically produced (including in-house production, except for some nuts) ■ Supports traceability through lot management We will provide inspection reports for the set products. ■ Utility model (No. 3230995), technical evaluation obtained ■ Various product variations to meet customer requests ◎ For more details, please refer to the PDF materials or feel free to contact us.

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Temporary assembly bolt for steel structures "Hug Bolt"

Temporary assembly bolt for steel structures "Hug Bolt"

Improved work speed with a large screw pitch! This is a temporary fastening bolt that is less prone to dents and suitable for reuse.

"Hug Bolt" is a temporary assembly bolt for steel structures that excels in workability and contributes to environmental and cost reduction. This product enhances work efficiency by increasing the pitch of the threads, the angle of the thread flanks, and the lead of the thread tip compared to conventional products, allowing for smooth rotation from the initial engagement of the bolt and nut. Additionally, its design minimizes the likelihood of dents on the threaded section, making it suitable for reuse. This reduces disposal costs and contributes to an eco-friendly society. Furthermore, as part of the recent efforts in construction sites to challenge zero emissions, we have devised a reuse plan for Hug Bolt. This initiative aims to shorten the resource retention time at construction sites, reduce environmental impact, and raise awareness of environmental conservation. 【Features】 ■ Doubles the thread pitch of standard products to speed up work ■ Changes the thread flank angle to 90 degrees and modifies the tip to an R shape for suitability for reuse ■ Displays size on the bolt head to improve usability ■ Features a thick shaft structure that meets axial shear force requirements ■ Reduces disposal costs through the application of the reuse plan, contributing to an eco-friendly society *For more details, please refer to the catalog or feel free to contact us.

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2-Piece Set Bolt for Construction "D-LOCK"

2-Piece Set Bolt for Construction "D-LOCK"

Shortening construction time with a unique two-piece structure, enhancing on-site safety!

This is an information page for the D-Lock catalog for construction. "D-LOCK" is a newly conceived set bolt designed with a simple two-piece structure, incorporating functional components with consideration for workability on site. With fewer parts, it is easy to handle and increases installation speed, making it easier to work even in limited spaces, while reducing the risk of dropping or losing components. It contributes to improved safety on site and reduced construction costs. 【Features】 ■ Workable two-piece structure Compared to the conventional five-piece (B, N, Wx2, SW), D-Lock adopts a two-piece structure. ■ Anti-return function and high workability D-Lock employs a disc spring as the anti-return function. ■ Bolts and nuts are domestically produced (including in-house production, except for some nuts) ■ Supports traceability through lot management Inspection reports for the set products will be provided. ■ Utility model (No. 3230995), technical evaluation obtained D-LOCK has received technical evaluation from SASST. ■ Various product variations to meet customer requests For more details, please refer to the PDF materials or feel free to contact us.

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High Strength 2-Piece Set Bolt "D-LOCK Strength Classification 6.8"

High Strength 2-Piece Set Bolt "D-LOCK Strength Classification 6.8"

We have prepared a stronger type of D-LOCK, which achieves high workability with a two-piece structure.

As a variation product of the "D-LOCK," we have prepared a product with a strength classification of 6.8, which is higher than the standard strength. Please take advantage of the D-LOCK's benefits while utilizing it for applications that previously could not use D-LOCK due to strength requirements. 【Features】 ■ Excellent workability with a 2-piece structure Unlike the conventional 5-piece (B, N, Wx2, SW), D-Lock adopts a 2-piece structure. ■ Anti-rebound function and high workability D-Lock employs a disc spring as an anti-rebound feature. ■ Bolts and nuts are domestically produced (including in-house production, except for some nuts) ■ Supports traceability through lot management We will provide inspection reports for set products. ■ Utility model (No. 3230995), technical evaluation obtained. ■ Various variation products that meet customer requests. ◎ For more details, please refer to the PDF document or feel free to contact us.

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High corrosion-resistant D-LOCK "TONEJI SUPER COAT"

High corrosion-resistant D-LOCK "TONEJI SUPER COAT"

Salt spray test cleared for 5000 hours! Introducing the highly corrosion-resistant D-LOCK with a unique top coating added to the molten zinc-tin alloy plating!

"TONEJI SUPER COAT" The high corrosion-resistant D-LOCK, featuring a unique top coating added to a molten zinc-tin alloy coating, has been introduced. We conducted a 5,000-hour salt spray test (JIS Z 2371) assuming use in salt damage areas, and no red rust was observed, while the occurrence of white rust was minimized. Additionally, we performed a more rigorous CASS test (ASTM B368-21) for 625 hours. Please make use of this for rust prevention measures in heavy salt damage areas. ◎ For more details, please refer to the PDF document or feel free to contact us.

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