Iron + Hexagonal Upset Bolt with Spring Washer and Large Flat Washer, Trivalent Chromate
FAP-0000E-S2
Steel + Hexagonal Upset Bolt with Spring Washer and Large Flat Washer, Trivalent Chromate
The head has a hexagonal shape with a cross hole. It can be tightened using either a screwdriver, spanner, or wrench. The washer does not come off the screw, which saves the trouble of setting the washer and improves work efficiency. It is also referred to as a Sems screw. It is compliant with EU-RoHS standards.
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basic information
Size range: M5-M12
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, considering 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 stirring state of the plating material, immersion time, temperature, and pH can be challenging, 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.
