イシトク List of Products and Services

Founded 130 years ago, Ishitoku Screw Co., Ltd. specializes in the wholesale and direct sales of industrial fastening components, screws in general, and related equipment, offering a wide range of products to meet your needs. This catalog has been organized by product categories to help you select the appropriate items you require. We hope it will be useful when placing your orders. 【Featured Products】 ○ Muscle Nut ○ Tore NOT ○ Bolt ○ Small Screw ○ Tapping ○ Nut You can view the catalog immediately after downloading it.

• bolt
• nut
• Other machine elements

This is a locking nut equipped with an internal spring that grips the bolt, withstands strong vibrations, and also prevents loosening.

• Other machine elements
• nut

The "Muscle Nut," a drop prevention nut, features a safety structure that prevents it from falling off even if forgotten to be tightened or if tightened loosely, achieving complete drop prevention that does not loosen even after multiple vibration tests. Each size did not loosen for 17 minutes in the high-speed vibration testing machine (NAS3350) of the Japan Quality Assurance Organization (JQA). Even if it does loosen, it will not fall off. The mechanism that prevents dropping lies in the spring coil; when tightening the nut, the coil expands and allows for tightening. It is also possible to re-tighten. Additionally, when attempting to loosen it, the coil wraps around the neck of the bolt, making it impossible to return. 【Features】 ■ It does not drop! ■ It can be stopped midway! ■ The tightening torque is sufficient with the appropriate torque! ■ It does not damage the bolt even when removing the nut! ■ Excellent workability due to its single nut design! *For more details, please request materials or view the PDF data from the download.

• nut

Even if products like solar panels have an extremely long lifespan, it is meaningless if the screws that support them cannot withstand the test of time. Bolts treated with Ionis Coat have high corrosion resistance, and since the bolts themselves are made of iron material compared to stainless steel, they are cost-effective. The thin film thickness prevents paint from accumulating on the screw and shaft parts, allowing for smooth work. Ionis Coat can also be applied to fixed brackets, reinforcement brackets, steel plates, and other components besides fastening parts. <Features> ■ Improved corrosion resistance of fastening bolts ■ Enhanced galvanic corrosion resistance against dissimilar materials ■ Reduced the number of product items from five pieces to two pieces to improve workability ■ Defect rate is close to 0% *For more details, please contact us or download the catalog.

• Surface treatment contract service

"Ionis Coat/SK" is an environmentally friendly surface treatment with high corrosion resistance, electrolysis prevention, and self-repairing properties. It can exhibit corrosion resistance superior to that of electroplating, paint-based treatments, and hot-dip galvanizing. It prevents galvanic corrosion between dissimilar metals and significantly reduces electrolysis on galvanized steel sheets and aluminum materials. The main component of the topcoat, silica, has high water solubility, allowing it to dissolve into scratches and cover them, enhancing corrosion resistance (it is strong against scratches due to its self-repairing properties). This is a high corrosion-resistant surface treatment that is also environmentally friendly (chromium VI free). 【Features】 ■ Corrosion resistance ■ Electrolysis prevention performance ■ Self-repairing properties ■ Environmentally friendly specifications *For more details, please contact us or download the catalog.

• Surface treatment contract service

The "Ionis Coat/SK Piercing Screw (Drill Screw)" is a piercing screw (drill screw) that has undergone surface treatment to exhibit high corrosion resistance and anti-electrolysis effects. The main component of the top coat, "silica," has high water solubility, which allows it to dissolve into scratches and cover the damaged areas, enhancing corrosion resistance. Additionally, the thin film thickness prevents paint from accumulating on the screw and shaft parts, making the work smoother. 【Features】 ■ Corrosion resistance equivalent to SUS304 ■ More cost-effective than stainless steel due to being made of iron ■ Hexavalent chromium-free, environmentally friendly *For more details, please download the catalog or contact us.

• Other machine elements
• bolt
• Surface treatment contract service

"Ionis Coat/Z" is an indoor specification, chrome-free two-layer coating. It is an environmentally friendly surface treatment with high corrosion resistance, prevention of electrolysis, and self-repairing properties. It can demonstrate corrosion resistance superior to that of electroplating, paint-based treatments, and hot-dip galvanizing. It significantly reduces electrolysis on galvanized steel sheets and aluminum materials. The main component of the top coat, silica, has high water solubility, allowing it to dissolve in scratches and cover damaged areas to enhance corrosion resistance. 【Features】 ○ Corrosion resistance ○ Electrolysis prevention performance ○ Self-repairing properties ○ Environmentally friendly specifications For more details, please contact us or download the catalog.

• Surface treatment contract service

"Ionis Coat/Y" is an indoor specification, chrome-free three-layer coating. It is an environmentally friendly surface treatment with high corrosion resistance, prevention of electrolysis, and self-repairing properties. It can demonstrate corrosion resistance superior to that of electroplating, paint-based treatments, and hot-dip galvanizing. It significantly reduces electrolysis on galvanized steel sheets and aluminum materials. The main component of the top coat, silica, has high water solubility, allowing it to dissolve in scratches and cover damaged areas to enhance corrosion resistance. 【Features】 ○ Corrosion resistance ○ Electrolysis prevention performance ○ Self-repairing properties ○ Environmentally friendly specifications For more details, please contact us or download the catalog.

• Surface treatment contract service

"Ionis Coat/Z" is a heavy-duty, hexavalent chromium-free four-layer coating. It is an environmentally friendly surface treatment with high corrosion resistance, electric corrosion prevention, and self-repairing properties. It can demonstrate corrosion resistance superior to that of electroplating, painting treatments, and hot-dip galvanizing. It significantly reduces electric corrosion on galvanized steel sheets and aluminum materials. The main component of the top coat, silica, has high water solubility, allowing it to dissolve into scratches and cover the damaged areas, enhancing corrosion resistance. 【Features】 ○ Corrosion resistance ○ Electric corrosion prevention ○ Self-repairing properties ○ Environmentally friendly specifications For more details, please contact us or download the catalog.

• Surface treatment contract service