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.
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basic information
【Product Specifications】 ■Strength Classification: 4.8 (Nut Strength Classification 5T) ■Surface Treatment: Zinc Plating (Uni-chrome) for sizes M12 to M20 Hot-Dip Galvanized Tin Alloy (KSG) Plating for sizes M6 to M20 ■Sizes: M6, M8, M10, M12, M16, M20 (For details, please refer to the size chart in the image section) *As of August 1, 2022, the quantity for some sizes has changed. *The construction catalog includes 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 ■ 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 hexagon bolts.
Line up（6）
| Model number | overview |
|---|---|
| M6 | Neck length 20, 25mm |
| M8 | Neck length 20 to 35mm (every 5mm) |
| M10 | Neck length 25 to 40mm (every 5mm) |
| M12 | Neck length 30, 35, 40, 45, 50 to 190mm (every 10mm) |
| M16 | Neck length 35, 40, 45, 50, 55, 60 to 190mm (every 10mm) |
| M20 | Neck length 50, 60mm |
catalog（2）
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Company information
TONEJI Co., Ltd. not only provides traditional fastener products such as bolts, nuts, and washers, but also aims to meet various customer needs in a diversifying 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 are committed to supplying safer, more convenient, and stable quality products with our new company name and structure.