- YongnianDistrict Handan city, Hebei Province
- Nancy@mj-anchor.com
- +86 18131004569
The Duojia Drop-in Concrete Expansion Anchor is a versatile, internally threaded fastener made from high-quality carbon steel, designed to create a secure, permanent anchor point in solid concrete. Finished with a protective White Zinc Plating (WZP), this anchor offers a reliable combination of strength and corrosion resistance for general purpose use. It is a “drop-in” style anchor that sits flush with the surface of the concrete, providing a clean and unobtrusive installation. While the anchor itself forms a permanent fixture, its internal threading allows for the easy removal and replacement of bolts and fixtures, offering excellent versatility. It is a staple fastener for contractors, engineers, and maintenance professionals in construction, industrial, and infrastructure projects.
The Drop-in Concrete Expansion Anchor features a robust, one-piece cylindrical body with four expansion slots and a knurled exterior. This knurling increases friction and prevents the anchor from rotating within the pre-drilled hole during setting. Housed inside the anchor is a pre-installed internal expander plug. The setting mechanism is simple and effective: after the anchor is inserted into a clean hole, a dedicated setting tool is used to strike the plug and drive it down into the tapered body of the anchor. This action forces the four slotted segments to expand outwards, creating a powerful 360-degree frictional grip against the wall of the concrete. This anchor is set before a bolt is inserted. The White Zinc Plating provides a standard level of protection against corrosion for indoor or dry applications. Its internal machine threads are compatible with standard metric bolts and threaded rods.
| Parameter Item | Specification Description |
|---|---|
| Product Name | Drop-in Concrete Expansion Anchor (WZP) |
| Brand Name | Duojia |
| Place of Origin | Hebei, China |
| Material | Carbon Steel |
| Surface Treatment | White Zinc Plated (WZP) |
| Available Sizes | M6, M8, M10, M12, M16, M20 |
| Strength Grades | 4.8, 8.8, 10.9, 12.9, A2-70, A4-70, A4-80 etc. |
| Measurement System | Metric |
| Application | Heavy Industry, General Industry, Construction |
| Certifications | ISO9001, ISO14001, ISO45001, SGS |
| Packaging Options | Small Pack + Carton + Pallet; Bag/Box with Pallet; Custom Requests |
This anchor is defined by its simplicity, reliability, and versatility, offering several key advantages. Its primary feature is its Reliable Holding Power, achieved through the four-way expansion mechanism that provides a secure, load-bearing anchor point in solid concrete. The Simple and Fast Installation process—requiring only a drill, a setting tool, and a hammer—significantly reduces labor time on site. A key benefit is the Flush-Mount Design, which leaves the concrete surface free of protrusions, ensuring a clean finish and preventing trip hazards. The anchor’s design also offers Fixture Versatility and Reusability; because the anchor is internally threaded, the bolt or threaded rod used to attach a fixture can be removed and re-installed as needed without affecting the anchor’s integrity. Finally, it is a Cost-Effective Solution for a wide range of static load applications.
The Drop-in Concrete Expansion Anchor is one of the most widely used fasteners for anchoring into concrete. It is the industry standard for Overhead Applications, such as suspending threaded rods from concrete ceilings to support MEP (Mechanical, Electrical, and Plumbing) systems, including pipework, HVAC ducting, fire sprinkler systems, and cable trays. In General Construction, it is used to fasten brackets, handrails, and structural supports to concrete walls and floors. For Industrial Settings, it is ideal for securing light-to-medium duty machinery, safety guards, and shelving systems. Its versatility makes it suitable for any application in solid concrete where a reliable, flush, and internally threaded anchor point is required.
