Iron flat washer, trivalent chromate black.
When the hole diameter of the material being fastened is larger than that of the screw, it can stabilize the screw head. By increasing the surface area of the screw head, it enhances the adhesion with the material. It is also referred to as a washer or flat washer. This product is compliant with EU-RoHS.
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basic information
Size range: Diameter 2 - Diameter 6
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, strength, and toughness. Based on carbon steel, which primarily consists of iron (Fe) and carbon (C), alloy steels that have undergone heat treatment or have additives such as chromium and molybdenum are used according to applications like 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 global awareness of environmental measures, and many industries, including automotive and semiconductors, are considering alternatives to hexavalent chromium; among these, it is 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 difficult, leading to inconsistencies in appearance and color. Furthermore, in general chromate treatment, 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.
