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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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) for sizes M8 to M20 ■ Sizes: M8, M10, M12, M16, M20 (For details, please refer to the size chart in the image section) * As of August 1, 2022, the quantity per size has changed for some sizes. * The construction catalog lists sizes M10 to M20. 【 Variations 】 ■ W-LOCK (Type with SW attachment) ◆ Strength Classification 6.8 D-LOCK (Type with higher strength 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 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 time may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
【Applications】 ■ Bolt connections for building rafters and purlins, and relatively minor structures ■ Construction machinery, industrial machinery, environmental equipment, etc. ■ Panel and frame connections for solar power plants ■ Connection work in narrow spaces such as piping ■ Bolt connections for stair handrails Additionally, it can be used in many bolt connection points where hexagon bolts were previously used.
Line up（5）
| Model number | overview |
|---|---|
| M8 | Neck length 20–35mm (in increments of 5mm) |
| M10 | Neck length 25 to 40 mm (every 5 mm) |
| M12 | Head length 30, 35, 40, 45, 50 to 190mm (every 10mm) |
| M16 | Neck lengths of 35, 40, 45, 50, 55, 60 to 190mm (in increments of 10mm) |
| M20 | Neck 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.