This is a concrete screw with a special surface treatment, also known as a blue concrete anchor or blue expansion anchor substitute. Due to the demanding environments in which these fasteners are used, we apply a high-performance anti-corrosion coating called Ruspert (often referred to as “hot rust-proof coating”).
These anchor screws are primarily used for fastening into concrete walls or high-hardness cement surfaces, where reliable, long-term performance is required.
The high-low thread design enhances grip and ensures a strong, secure hold between the screw and the connected material. This makes the fastening more stable and durable, even under vibration or heavy load.
Popular sizes include 1/4” and 3/16”, and the screws are available in blue and white finishes. We offer free samples for quality testing—feel free to contact us by email for more information.
This product is a great alternative to traditional plastic wall plugs, and it's widely used in applications requiring concrete anchors, especially where flat head concrete anchors are needed for a flush finish.
