Built-in Screw - List of Manufacturers, Suppliers, Companies and Products

Built-in Screw Product List

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Seat-mounted screw "WIS"

Seat-mounted screw "WIS"

Reduced labor hours for fastening operations! Successfully integrated a washer with functionality into a screw!

"WIS" is a screw with an integrated washer. For thin plates, a play of less than 0.5 pitch below the washer is possible (when a spring washer is included). Furthermore, by reducing the diameter of the shaft, it is also possible to prevent interference with the internal thread. There is no risk of the washer falling off, significantly reducing the labor involved in tightening operations, and automatic tightening becomes easier. 【Features】 ■ Eliminates the hassle and cost of combining screws and washers ■ No waste due to loss of washers ■ No risk of washer falling off, significantly reducing the labor involved in tightening operations ■ Automatic tightening becomes easier ■ Simplifies purchasing and inventory management, eliminating waste and inconsistency * For data and material requests, please feel free to contact us through the Yamashina website: http://www.yamashina.ne.jp/

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Embedded screw 'Polis'

Embedded screw 'Polis'

Omitting the installation of washers! Improved workability with screws that come with built-in resin washers.

"POLIS" is a screw that comes with a pre-installed resin washer. The screws, which have completed surface treatment, are manufactured by pressing them into a resin washer and inserting them with a screwing rotation. This eliminates the need for washer installation, improving work efficiency. It is also used to prevent scratches on the counterpart material and enhance corrosion resistance. 【Features】 ■ Eliminates the need for washer installation ■ Improves work efficiency ■ Prevents scratches on the counterpart material ■ Enhances corrosion resistance ■ Reduces overall costs *For data and material requests, please feel free to contact us through the Yamashina website: http://www.yamashina.ne.jp/

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Spring washer incorporated screw "TWO LOCK M's"

Spring washer incorporated screw "TWO LOCK M's"

Ideal for delicate painted products! Screws with integrated spring washers made of stainless steel, excellent in corrosion resistance!

"TWO LOCK M's" is a screw that incorporates a TWO LOCK washer. Compared to conventional spring washers, it has a wave-shaped design, which provides a greater spring reaction force and makes it more resistant to loosening. Additionally, its unique shape minimizes the biting into the counterpart material during tightening, making it less likely to cause damage. The washer's low height also means that less tightening force is required. As a result, the screw can be shorter and lighter. We have developed and commercialized this steel TWO LOCK with its advantages intact, using stainless materials that are resistant to rust. ● For other functions and details, please download the catalog.

  • Work tools

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Seat bolt assembly screw

Seat bolt assembly screw

Low cost! High quality! We will meet the delivery deadline!

Our company, as a specialized manufacturer of embedded screws, has been working for many years on reducing the dimensional compression of the "incomplete screw section below the head," which is a drawback of embedded screws. Today, due to the miniaturization and thinning of industrial products, the thickness of fastening components has also decreased, and we have received numerous inquiries asking, "Can the incomplete screw section below the head be compressed?" In response, we have researched technology that allows for stable mass production without compromising the original functions of the screws, such as reduced axial force, and we are now able to fasten even very thin materials. 【Product Line】 ■ Various types of end processing ■ Various types of anti-loosening processing ■ Various types of bagging processing ■ Various standard products (pan, bind, truss, upset, trimmer, flange, etc.) ■ Low head sems, etc. *For more details, please feel free to contact us.

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Thin plate mounting screw "Cero Gap"

Thin plate mounting screw "Cero Gap"

Fully seated! No gaps! Stainless steel washer-integrated screws for thin plates.

The "Cero Gap" is a washer-integrated screw that can be tightened without any gaps, even with thin sheet materials. Due to cost reduction and weight saving, there is a demand for thin sheet materials, but conventional washer-integrated screws create gaps and cannot securely tighten thin sheets. This product features a relief groove under the head (below the washer), allowing for complete seating. 【Features】 ■ Torque strength: M4 ... 3.63 Nm * The strength is based on our torsion test results. JIS standard M4 ... 2.70 N·m or more. * For more details, please refer to the PDF document or feel free to contact us.

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