bolt×トーネジ( 旧 東京ネジ製作所) 東京本社 - List of Manufacturers, Suppliers, Companies and Products

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Tonegii 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 aims to meet the diverse needs of customers in a changing society by assisting in the development and design of metal parts and offering value-added proposals for better product creation. Currently, we mainly manufacture and sell products under our unique brands such as D-Lock, HugBolt, and T-LSB. We also engage in the production of custom-made products 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 consistently high-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.

  • Work tools
  • Corrugated products/liner plates

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Shortening construction period and reducing construction costs: 2-piece set bolt 'D-LOCK'

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

The "D-LOCK" is a newly conceived set bolt designed with a simple two-piece structure, incorporating functional components, considering workability on-site. With fewer parts, it is easy to handle and speeds up installation, 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), 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 responding to customer requests ◎ For more details, please refer to the PDF document or feel free to contact us.

  • Fastening hardware

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Temporary assembly bolt for steel structures "Hug Bolt"

Improved work speed with a large screw pitch! This is a temporary fastening bolt that is resistant 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 improves workability by significantly increasing the pitch of the threads, the angle of the thread peaks, 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 time resources remain on construction sites, reduce environmental impact, and enhance environmental conservation awareness. 【Features】 ■ Doubles the thread pitch of standard products to speed up work ■ Changes the thread angle to 90 degrees and modifies the tip to a rounded shape for suitability in reuse ■ Displays size on the bolt head to improve usability ■ Features a thick shaft structure that meets axial shear force requirements ■ Reduces disposal costs and contributes to an eco-friendly society through the application of the reuse plan *For more details, please refer to the catalog or feel free to contact us.

  • Interior and exterior construction accessories
  • Temporary Construction Materials
  • Steel construction

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

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 for ease of use on site. With fewer parts, it is easy to handle and speeds up installation, making it easier to work in limited spaces while reducing the risk of dropping or losing components. It contributes to improved safety on site and reduced construction costs. 【Features】 ■ User-friendly two-piece structure Compared to the conventional five-piece (B, N, Wx2, SW), D-Lock adopts a two-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) ■ Traceability supported by lot management We will provide inspection reports for the set products. ■ 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.

  • Joints between components
  • Fastening hardware

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T-LSB (Tornaji Lag Screw Bolt)

Fastening components used for various joints utilizing wooden materials. For all types of fastening in wood-steel hybrid structures and RC members, etc.

T-LSB (T-Nut Lag Screw Bolt) is a product developed to simplify construction and reduce costs as a component for fastening steel plates and wood materials such as CLT. It demonstrates significant effectiveness in the construction of composite structures involving wood-to-wood, wood-to-steel, and wood-to-steel-to-RC components. 【Features】 - There is no hexagonal head like traditional LSBs, so counterboring of the wood is unnecessary. - Since there is no counterboring, the epoxy resin filling work is not required. - Chiseling work, which is done when using fillers, is not necessary. - It can be easily screwed in using a dedicated attachment bolt. - Costs can be reduced by eliminating counterboring processing fees, filler costs, and chiseling work. - Simplifying construction can shorten the construction period. - Management is conducted for each manufacturing lot, and inspection reports are provided. ◎ For more details, please refer to the PDF document or feel free to contact us.

  • Joints between components
  • Other flooring materials

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

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

As a variation product of "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 D-LOCK's benefits while utilizing it for applications that have not been possible until now 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. ■ Return prevention function and high workability D-Lock employs a disc spring as a return prevention feature. ■ Bolts and nuts are domestically produced (including in-house production, except for some nuts) ■ Traceability supported by 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.

  • Joints between components
  • Fastening hardware

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

Salt spray test passed 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, enhanced with a unique top coating on a molten zinc-tin alloy plating, has arrived. 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 CASS test (ASTM B368-21) for 625 hours as an even more rigorous examination. 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.

  • Fastening hardware

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