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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basic information
【Product Specifications】 ■Strength Classification: 4.8 (Nut Strength Classification 5T) ■Surface Treatment: Zinc Plating (Electrogalvanized) for sizes M12 to M20 Hot-Dip Galvanized Zinc-Tin Alloy (KSG) Plating for sizes M8 to M20 ■Sizes: M8, M10, M12, M16, M20 (Please refer to the size chart in the image section for details) *As of August 1, 2022, the quantity per size has been changed for some sizes. 【Variations】 ■Stainless Steel Products (Available in some sizes, please refer to the size chart in the image section) ■W-LOCK (SW Mounted Type) ◆Strength Classification 6.8 D-LOCK (Higher strength type than usual) ◆TONEJI SUPER COAT (D-Lock with higher corrosion resistance than usual) *For products marked with ◆, dedicated product pages are available. Please take a look. *If you have requests regarding size, material, etc., please feel free to consult with us. *Orders for nuts only without sets are also accepted. *For more details, please do not hesitate to contact us.
Price range
Delivery Time
※The delivery date may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
【Applications】 ■ Bolt connections for building rafters and battens, and relatively minor structures ■ Construction machinery, industrial machinery, environmental equipment, etc. ■ Panel and frame connections for solar power plants ■ Joining work in narrow spaces such as piping ■ Bolt connections for stair handrails Additionally, it can be used in many bolt connection points that previously used hexagonal bolts.
Line up（5）
| Model number | overview |
|---|---|
| M8 | Neck length 20–35mm (every 5mm) |
| M10 | Neck length 25-40mm (in increments of 5mm) |
| M12 | Neck lengths of 30, 35, 40, 45, and 50 to 190 mm (in increments of 10 mm) |
| M16 | Neck lengths of 35, 40, 45, 50, 55, 60 to 190 mm (in increments of 10 mm) |
| M20 | Head length 50, 60mm |
Company information
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 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 stable quality products with a new company name and new structure.