コクブ List of Products and Services

The "Hard Tech," which adopts the new stainless material KDS2000, is a drill screw that significantly improves workability with high corrosion resistance and high strength. The drill screw "Hard Tech" maintains its corrosion resistance even after heat treatment, and by using stainless steel KDS2000, which has special alloy elements added, it has greatly improved strength without losing toughness and ductility compared to conventional stainless steel. Additionally, thanks to the KDS coating, it has significantly reduced the seizing and galling commonly seen in conventional stainless copper. 【Features】 ■ Achieves corrosion resistance equal to or greater than SUS304 series stainless steel ■ Approximately twice the strength of SUS304 series stainless steel ■ Achieves high strength surpassing SUS410 ■ Significantly improves workability ■ Greatly reduces seizing and galling seen in conventional stainless steel *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the "Concrete Screw Twister" handled by Kokubu Co., Ltd. This product can be used for fastening various components to concrete substrates. The surface treatment is a rust-proof treatment. For further details, please contact us. 【Product Details】 ■Material: Iron ■Surface Treatment: Rust-proof treatment ■Screw Tip: Sharp point ■Thread: High-low thread *For more information, please refer to the PDF document or feel free to contact us.

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"Sunsunbis" is a product that leverages years of expertise in manufacturing screws for solar panel mounting frames. Its special neck shape firmly secures the resin packing, providing excellent water resistance. The round top shape prevents rainwater accumulation, eliminating concerns about rust. Additionally, it is equipped with a spoon blade that can be used on a wide variety of wood materials and thin steel plates. 【Features】 ■ Suitable for outdoor fastening applications ■ Double lead design for quick work efficiency ■ Excellent water resistance due to the firm grip on the resin packing ■ Round top shape prevents rainwater accumulation, eliminating rust concerns ■ Equipped with a spoon blade that can be used on a wide variety of wood materials and thin steel plates *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce "Flower Vis" handled by Kokubu Corporation. This product can be used for fastening to ALC boards under 50mm and iron or wooden substrates. Additionally, the case includes one dedicated bit. For more details, please contact us. 【Product Details】 <For Iron Substrates> ■ Material: Iron ■ Surface Treatment: Dacro Treatment ■ Screw Tip: Regular ■ Screw Thread: Coarse Thread *For more information, please refer to the PDF document or feel free to contact us.

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We would like to introduce the "New Point Drill Screw" handled by Kokubu Co., Ltd. This product can be used for fastening thin steel plates such as PVC steel sheets and spandrels, as well as for fastening aluminum materials to each other, resin, and aluminum substrates. Additionally, we also accept requests for head painting, other surface treatments, and packaging in small bags separately. For more details, please contact us. 【Product Details (Partial)】 <Pan Head> ■Material: Steel ■Surface Treatment: Zinc Plating ■Screw Tip: Regular ■Thread Type: Coarse Thread, etc. *For more information, please refer to the PDF document or feel free to contact us.

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The "Spoon Screw" is a wood screw designed for wooden substrates, featuring a spoon-shaped drill bit at the tip made of thin steel plate (approximately 1.0 mm) that allows for penetration. As it is screwed in, it cuts through the wood fibers and creates a pilot hole, thereby preventing wood splitting. It is effective for hard woods and knots in wood, ensuring a high level of holding power with its coarse thread design. 【Features】 ■ Cuts through wood fibers and creates a pilot hole while being screwed in, preventing wood splitting ■ Effective for hard woods and knots in wood ■ Ensures high holding power with coarse thread design ■ Suitable for fastening to a wide range of wooden substrates, including hard wood building materials and resins *For more details, please refer to the PDF document or feel free to contact us.

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• Other work tools

"Hard Tech" is a high corrosion-resistant and high-strength drill screw made from the new stainless steel material KDS2000. By using stainless steel KDS2000, which has special alloy elements added, we have significantly improved strength without losing ductility and toughness compared to conventional stainless steel. We offer a lineup that includes "Hard Tech Nabes," "Hard Tech Saras," and "Hard Tech Hexagons." 【Features】 ■ Achieves corrosion resistance equal to or greater than SUS304 series stainless steel ■ Approximately twice the strength of SUS304 series stainless steel ■ Achieves high strength surpassing SUS410 ■ Significantly improves workability ■ Greatly reduces galling and seizure seen in conventional stainless steel *For more details, please refer to the PDF document or feel free to contact us.

• Other work tools
• nut
• bolt

This catalog features a wide range of screws handled by Kokubu Corporation. You can choose from various applications, including the high corrosion-resistant and high-strength drill screw "Hard Tech Nab" made from the new stainless material KDS2000, as well as "Neutras," which is suitable for fastening metal siding, spandrels, and subways. [Featured Products] ■ Hard Tech Nab ■ Hard Tech Hex ■ Hard Tech Flat ■ Nab *For inquiries, please visit the following URL: http://www.kokubucorp.jp/contact/index.html *For more details, please download the PDF or contact us.

• Other machine elements
• nut
• bolt