Iron + small plate screw trivalent chromate black
It is a small screw with a flat top and a conical-shaped seat. It is used when you do not want the head of the screw to protrude. The material being fastened needs to have a countersink. It is compliant with EU RoHS standards.
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basic information
Size range: M2-M5
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 steel 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 with added elements such as chromium and molybdenum are used, depending on the application in terms of shape, strength, and corrosion resistance, often after undergoing heat treatment. 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 that occurs 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, 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 finish. 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.