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  3. 山喜産業
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山喜産業

Establishment1952 year
capital8800Ten thousand
number of employees50
addressOsaka/Chuo-ku, Osaka-shi/6-10-26 Tanimachi
phone06-6764-1101
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last updated:Mar 16, 2026
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山喜産業 List of Products and Services

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For sheet metal use For sheet metal use
For roofing work For roofing work
For tight frame For tight frame
General hardware use General hardware use
Others Others
Heatstroke prevention products Heatstroke prevention products
For

For tight frame

I will introduce products for tight frames.

Tight frame screws H steel

Maximum applicable plate thickness of 12.0mm! Screws for tight frames with excellent workability.

The "screw for tight frames for H steel" is a screw designed for attaching tight frames to H steel. Thanks to the screw fastening method, it can be safely used even in places where open flames are prohibited. It features high shear strength due to its special neck shape. Additionally, its low head allows for installation without interfering with roofing materials. We also offer screws for steel and wood substrates. 【Features】 ■ Maximum applicable plate thickness: 12.0mm ■ For thick plates ■ High shear strength ■ Can be installed without interfering with roofing materials ■ Excellent workability *For more details, please refer to the catalog or feel free to contact us.

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Screw for tight frame

Three types of screws for tight frames are available to choose from according to your needs!

Yamaki Sangyo offers "screws for tight frames." We have a lineup including "thick plate H steel" that can be installed without interfering with roofing materials, as well as options for "steel substrates" and "wood substrates." You can choose screws suitable for your application. 【Product Lineup】 ■ Screws for tight frames H steel - Small box: 5.5×50mm / 6.0×50mm - Pack: 5.5×50mm / 6.0×50mm ■ Screws for tight frames steel substrate - 6.0×19mm / 6.0×25mm ■ Screws for tight frames wood substrate - 7.0×55mm *For more details, please refer to the PDF document or feel free to contact us.

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About the holding power of screws and nails.

For the concern of screws and nails being easy to pull out! Here are some methods to maintain holding power!

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.

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About the work efficiency of screws and nails.

Improve work efficiency by choosing the right screws and nails! Here are some tips to enhance work efficiency!

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.

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About the corrosion resistance of screws and nails

We will introduce methods to maintain the corrosion resistance of screws and nails!

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.*

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Regarding the finish of screws and nails.

For those concerned about appearance! Here are examples of well-finished screws and nails.

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.

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About materials, processing, and shapes.

At Yamaki Industries, we offer a variety of innovative fasteners!

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.

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[Product Development Case] Examples and Achievements of Fasteners for Securing Roofing Materials

We would like to introduce examples of product development for screws and nails that we have proposed!

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.

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About the development system and facilities

We will introduce our development system and the facilities we have!

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.

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About the strength of screws.

We will propose screws and nails that are highly durable and ideal for the job site!

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.

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Points for Choosing Screws and Nails

Are you unsure about how to choose the right screws and nails? Here are some selection points!

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.

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(With nails) Head nails, replacement folding nails, eye nails.

Introducing Japanese nails such as head nails that can be used for various purposes!

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.

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