Steel hexagon socket bolt (cap bolt) with spring washer, trivalent chromate black.
The hexagon socket bolt is equipped with a spring washer. Since it is pre-assembled, it reduces assembly time. The presence of the washer also prevents damage to the seating surface of the counterpart material. It is compliant with EU-RoHS standards.
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basic information
Size range: M3-M10
Price information
Delivery times vary depending on the quantity. Same-day shipping is possible at the earliest. Please feel free to contact us.
Delivery Time
※Delivery times vary depending on the quantity. Same-day shipping is possible at the earliest. Please feel free to contact us.
Applications/Examples of results
Steel is widely used as a material for screws due to its easy availability and strength. Based on carbon steel, which primarily consists of iron (Fe) and carbon (C), alloy steels are used that have been heat-treated or contain additives such as chromium and molybdenum, depending on the application in terms of shape, strength, and corrosion resistance. Trivalent chromate is a surface treatment that serves as an alternative to chromate plating, providing corrosion resistance equal to or greater than traditional chromate treatment without containing harmful hexavalent chromium. Additionally, it can control the decrease in corrosion resistance during heating, which is a drawback of chromate treatment. In recent years, there has been a growing awareness of environmental measures globally, and many industries, including automotive and semiconductors, are considering alternative treatments to hexavalent chromium, with trivalent chromate being used as a substitute for chromate plating. On the other hand, compared to chromate treatment, managing the process conditions such as the stirring state of the plating material, immersion time, temperature, and pH can be challenging, which may lead to inconsistencies in appearance and color. Furthermore, in general chromate treatments, the color may change as corrosion begins.
Company information
Wilco sells various fastening components, including screws, as well as professional tools. Please feel free to contact us regarding custom products, custom processing, and the issuance of various certificates and documents related to other products.
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