Screw-In-Undercut Anchor Manufacturers

Screw-In-Undercut Anchor Manufacturer

As a Screw-In-Undercut Anchor Manufacturers, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.

Jiangsu Aozheng Metal Products Co., Ltd. is a professional manufacturer of screw-in undercut anchors, part of our comprehensive Undercut Anchoring System. Our factory in Xinghua, Jiangsu, integrates raw material forming and CNC machining to produce anchors that deliver reliable, high-load fixings for natural stone cladding, precast concrete panels, and thin masonry. With an annual capacity of 8,000 tons, we supply project-specific configurations to construction teams and distributors worldwide.

Our screw-in undercut anchors are engineered for applications where conventional expansion anchors cannot deliver the required pull-out resistance or where panel thickness limits drilling depth. The undercut principle—where the anchor expands into a precisely drilled recess—provides a positive mechanical interlock that resists both static and dynamic loads. As a Screw-In-Undercut Anchor manufacturer, we control the entire production process, from material selection to final inspection, ensuring consistent geometry and performance.

Product Range and Applications

We supply screw-in undercut anchors in a range of sizes and materials to match the substrate and load requirements of your project. The anchor is installed by screwing it into a pre-drilled cylindrical hole; the tapered end forces the base material to deform, creating an undercut that locks the anchor in place. This design is particularly suited for:

• Natural stone cladding – granite, marble, and limestone panels from 20 mm to 50 mm thick.
• Precast concrete elements – large panels, spandrels, and architectural concrete.
• Thin masonry and brick – where drilling depth is limited.
• High-load facade systems – requiring seismic or wind-load resistance.

Our range includes standard M6, M8, M10, and M12 sizes, with custom lengths and head styles available. For larger panels, we offer an undercut anchor system solution that distributes loads across multiple anchors, reducing edge distance requirements and improving overall stability.

Configuration Options

Engineering and Quality Assurance

We manufacture screw-in undercut anchors using automated cutting, CNC machining, and laser processing. Each batch is produced under strict tolerances to ensure the undercut geometry matches the drilling tool specifications. Our in-house laboratory conducts tensile testing, hardness checks, and dimensional verification on every production run.

For projects requiring third-party certification, we can coordinate testing to standards such as ETAG 001 or ASTM E488, depending on your market. We also provide installation documentation, including recommended drilling depths and torque values, to support your site team.

Installation and Integration

Proper installation is critical for undercut anchors. We supply anchors that work with standard undercut drilling tools, and we can also provide the matching drill bits or drilling machines if required. Our technical team can advise on edge distances, anchor spacing, and substrate conditions to optimize load capacity.

For automated production environments, our anchors are dimensionally consistent to allow reliable feeding into automated installation equipment. We also offer anchors with pre-assembled washers or nuts to reduce on-site handling.

Information We Use to Configure Your Solution

To prepare a precise quotation and engineering proposal, we need the following project details:

• Substrate material (concrete grade, stone type, thickness)
• Required load per anchor (tension and shear)
• Panel dimensions and weight
• Environmental conditions (coastal, industrial, high temperature)
• Drilling equipment available on site
• Any project-specific standards or certifications

Share your drawings or specifications, and our engineers will confirm the anchor size, material grade, and installation parameters. We support both standard and fully customized designs, with samples available for pre-production validation.

FAQs

What is the difference between a screw-in undercut anchor and a standard expansion anchor?

A screw-in undercut anchor creates a mechanical interlock by expanding into an undercut recess in the base material, rather than relying on friction. This provides higher pull-out resistance and is less sensitive to cracks in concrete.

Can you supply anchors for 20 mm thick granite panels?

Yes, we offer short anchors specifically designed for thin stone panels. The anchor length and undercut depth are matched to the panel thickness to avoid breakout.

Do you provide installation tools?

We can supply the corresponding undercut drilling tools and setting tools as part of a complete system. Our technical documentation includes step-by-step installation instructions.

What materials are available for corrosive environments?

For coastal or industrial environments, we recommend stainless steel grade 316. We also offer surface treatments such as hot-dip galvanizing for carbon steel anchors.

How do you ensure quality for large orders?

We perform in-process inspections and final testing on each batch. Our quality lab is equipped with spectrometers and tensile testers to verify material composition and mechanical properties.