山喜産業 List of Products and Services

The "Roll Connection Screw" is available in four sizes: 25mm, 28mm, 32mm, and 41mm, each color-coded for easy identification of length even after installation. The 28mm, 32mm, and 41mm sizes have received ministerial approval from the Ministry of Land, Infrastructure, Transport and Tourism. The surface treatment is chrome-free, making it environmentally friendly. 【Features】 ■ Ministerial approval (28mm, 32mm, 41mm) ■ Color-coded by size ■ Roll connection ■ Length can be identified even after installation ■ Chrome-free finish *For more details, please refer to the catalog or feel free to contact us.

Our company is a trading firm that primarily offers screws and nails for construction, as well as fasteners to customers in various other industries. We support our customers from the selection stage and provide suitable products. The "Eco-Taruki Screw" is a screw designed for securing rafters. One screw has a load capacity equal to or greater than the twisting hardware ST-12. The screw head features size markings and is available in different colors based on size. 【Features】 ■ One screw has a load capacity equal to or greater than the twisting hardware ST-12 ■ Size markings on the head ■ Color-coded by size *For more details, please refer to the PDF document or feel free to contact us.

The "Eco Panel Screw" is a screw designed for exterior insulation construction methods and for securing rafters. It excels in fastening for exterior insulation methods and insulation panel materials. The under-head screw provides strong support for tightening and prevents board lifting! Even if you miss the mark while driving, it is easy to remove with the under-head screw. Additionally, the special flat flexible head offers excellent tightening over a wide surface. The square hole design allows for better force transmission, stable driving, and eliminates concerns about bit disengagement. 【Features】 ■ Equivalent or superior load capacity to twist hardware ST-12 with just one screw ■ Environmentally friendly trivalent chromate treatment ■ Special tip processing reduces wood splitting ■ Head size engraving included ■ Square hole design includes one bit as a bonus with each small box *For more details, please refer to the PDF document or feel free to contact us.

"Companevis" is a high-quality screw with a plus 10 specification that has been overcoated for dacron processing. Using a fuzz cutter, it cuts the fuzz of the plywood just before it fits. The special screw reduces creaking in the house. Additionally, it is a dedicated screw that works particularly well with plywood, offering high fastening strength and has threads all the way to the tip, ensuring excellent workability. [Features] - Cuts the fuzz of the plywood just before it fits with a fuzz cutter - Reduces creaking - High fastening strength - Dedicated screw that works particularly well with plywood - Excellent workability *For more details, please refer to the PDF document or feel free to contact us.

When using screws or nails in conditions where they are likely to come loose, it is especially important to pay attention to holding power. There are three key points to maintain holding power: "surface treatment," "shape," and "special products." One method is to apply a special chemical to the surface of the product, which acts as an adhesive to prevent loosening and slipping. Another method involves altering the shape of the product's body to make it less likely to come loose. Additionally, there are methods that combine the product with other materials or shapes to achieve a loosening prevention effect. [Key Points for Maintaining Holding Power] ■ Surface Treatment ■ Shape ■ Special Products *For more details, please refer to the PDF document or feel free to contact us.

To improve work efficiency, it is necessary to consider various factors for each site where fasteners (screws, nails) are used, ensuring that tasks can be performed easily, quickly, and with one less step, depending on the objectives. The two key points for enhancing work efficiency are "connection" and "shape." Even with the same screws or nails, connecting them and using a machine for installation allows for one-handed operation, rather than manually hammering or tightening them individually. Additionally, there are methods to make the product's body shape less prone to disengagement through processing. [Points for Improving Work Efficiency] ■ Connection ■ Shape *For more details, please refer to the PDF document or feel free to contact us.

Corrosion resistance is a very important point in the selection of screws and nails. One method to enhance corrosion resistance is surface treatment. Surface treatments include electroplating, where metal is electrolyzed and deposited on the surface; hot-dip galvanizing, where metal is melted and coated like a garment; and painting, where resin or metal powder is applied. In addition, material and galvanic corrosion are also key points in selecting screws and nails with high corrosion resistance. **Points for Selecting Corrosion-Resistant Screws and Nails** - Surface treatment - Material - Galvanic corrosion *For more details, please refer to the PDF document or feel free to contact us.*

Screws and nails are important not only for their functionality but also for their appearance. When considering the finish of screws and nails, the key points are "surface treatment" and "shape." By applying surface treatment (such as painting) mainly to the heads of screws and nails, their appearance can be improved, or by matching the color with the material, the heads of the screws and nails can be made less noticeable. Conversely, there are cases where items like decorative nails, tacks, and chrysanthemum nails are used to stand out (by adding decorations). [Key Points] ■ Surface Treatment ■ Shape *For more details, please refer to the PDF document or feel free to contact us.

Our company offers a variety of cleverly designed fasteners. The "Namiitabisu" is used to secure corrugated sheets made of reinforced plastic (polycarbonate) to aluminum or steel frameworks. The screw itself is equipped with a stopper that matches the height of the corrugated sheet's waves, designed to prevent leaks caused by insufficient driving or deformation of the washer and corrugated sheet due to excessive driving. In addition, we have developed various products such as the "Bestreamabis," used for securing fire-resistant sheathing to C-shaped steel, and "Double Head Nails," used for temporary fastening. 【Features of Namiitabisu】 ■ A stopper on the screw that matches the height of the corrugated sheet's waves ■ A design that prevents leaks caused by insufficient driving ■ A design that prevents leaks caused by deformation of the washer and corrugated sheet due to excessive driving *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce a case study on the development of fasteners proposed by Yamaki Sangyo for securing cement flat roof materials to fire-resistant sheathing. The customer's request was to secure the roofing materials to the fire-resistant sheathing. Since the substrate is made of inorganic material rather than fibrous material, there was a significant issue with fasteners being prone to loosening, and there was concern that if the heads of the fasteners were not flat, the roofing materials would crack when walked on. Therefore, we proposed using screws instead of nails. Additionally, we used a special flexible material with grooves in the countersunk part of the screw to ensure that the screw heads would not protrude above the surface. Through these innovations, we were able to propose screws that meet the customer's requirements. 【Case Study】 ■ Issues - Fasteners are very prone to loosening when secured to inorganic substrates. - If the heads are not flat, roofing materials may crack when walked on. ■ Proposal - Use screws instead of nails. - Use a special flexible material with grooves in the countersunk part of the screw to ensure the screw heads are flush with the material. *For more details, please refer to the PDF document or feel free to contact us.

We have over 20,000 types of stock available, and we will help you find the screws and nails that suit your needs from these ready-made products. If that does not meet your requirements, we can create custom-made options. Depending on the base material and the items used to secure it, we need to consider various factors such as holding power, workability, corrosion resistance, strength, and finish in a comprehensive manner. Let's understand the points and use the appropriate items. 【Points for selecting screws and nails】 ■ Holding power ■ Workability ■ Corrosion resistance ■ Strength ■ Finish *For more details, please refer to the PDF document or feel free to contact us.

When fastening screws or nails to objects subjected to shear forces, it is necessary to use high-strength ones. Two points for selecting strong screws and nails are "shape" and "material/surface treatment." To increase strength, one can simply use thicker screws or nails, but it is essential to consider various conditions, such as situations where it may not be possible to use thicker ones due to the nature of the site. [Points to Improve Work Efficiency] ■ Connection ■ Shape *For more details, please refer to the PDF document or feel free to contact us.

Yamaki Industries has numerous partner factories for the prototyping and development of screws and nails. Creating a single nail or screw involves many people, including sales, developers, and engineers, who work together to shape the product under a thorough testing and development system. We particularly focus on tests to ensure that we meet specific requirements. 【Equipment Owned (Partial)】 ■ Tensile Testing Machine - Manufacturer: Shimadzu Corporation - Model: 47052 - Maximum Load: 10,000N ■ Hardness Tester - Manufacturer: Akashi - Model: MODEL-MVK TYPE C ■ Salt Spray Testing Machine - Manufacturer: Suga Test Instruments - Model: ST-ISO-3 *For more details, please refer to the PDF document or feel free to contact us.

The "Maki-gashira" nails handled by Yamaki Sangyo are used for driving the boards of sliding doors into the rails, securing the bamboo of lattice windows, and fastening the horizontal rails for the upper and lower parts of the sliding doors at the entrance. They can also be used for various purposes in tea room sukiya architecture. The "Kai-ore" nails are used for wall boards, bamboo fences, dog barriers, horse supports, well buckets, and in various other applications. The "Me-kasu" nails can be used to secure floorboards like green decking to joists, as well as for hanging ceiling boards and duckboards, among other uses. 【Lineup】 ■ Maki-gashira ■ Kai-ore ■ Me-kasu *For more details, please refer to the PDF materials or feel free to contact us.

The "Kazaribou" handled by Yamaki Sangyo is a type of nail or tack used for various purposes such as chairs, furniture, and folk crafts. Types include taiko tacks, foot-split tacks, round-ring bases, lattice tacks, chrysanthemum tacks, tortoise-shell tacks, tokin tacks, sliding tacks, stone tacks, underlay tacks, chair tacks, and medium tacks. [Features] ■ Usable for various purposes such as chairs, furniture, and folk crafts ■ A rich lineup *For more details, please refer to the PDF document or feel free to contact us.

These are screws for the architectural sheet metal industry. Application: screws for fastening corrugated sheets and various accessories to wooden substrates. There are a total of 15 colors available for the head. They feature a special tip design that prevents burrs during installation. The coating is highly weather-resistant to prevent deterioration from ultraviolet rays.

The "Quick Vis Kaera LB" is a high corrosion-resistant product that has been treated with a surface finish suitable for drill screws and tapping screws that require excessive screwing torque. Thanks to a strong alloy plating base, it resolves the issue of plating peeling off during screwing, exposing the base material and causing corrosion in a short period. It is chrome-free, harmless, and safe to use. The insulating effect of the resin-based topcoat and the dual effect of the alloy coating minimize the potential difference, eliminating the problem of galvanic corrosion that occurred when using stainless steel (SUS410) screws with zinc-coated steel plates. 【Features】 ■ Prevents peeling during screwing with a strong plating base ■ Insulating effect of the resin-based topcoat prevents galvanic corrosion ■ Chrome-free, harmless, and safe ■ Reduces the possibility of delayed fracture (hydrogen embrittlement) ■ Exhibits excellent rust prevention effects on both iron and stainless steel (SUS410) materials *For more details, please download the PDF or feel free to contact us.