Iron + pot B tight, made by Nitto Seiko, trivalent chromate black.
It is a screw that can be tightened while forming a male thread on the counterpart component, eliminating the need for thread processing or nuts. The cross-section of the screw part is shaped like a rice ball (triangular), allowing for fastening with a smaller torque compared to tapping screws. The screw pitch is the same as that of two types of tapping screws. It can be used with both steel plates and resin components. It enables the standardization and integration of screws during assembly manufacturing. B-Tight is a registered trademark of Nitto Seiko. It is compliant with EU-RoHS standards.
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basic information
Size range: M2-M4
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 are used that have undergone heat treatment or have 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 that occurs 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 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 parameters such as the stirring state of the plating material, immersion time, temperature, and pH can be difficult, leading 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.
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