A 4pcs shield anchor is a type of expansion anchor, specifically designed for heavy-duty applications in concrete, brick, and block walls. It consists of a bolt, nut, washer, and a four-piece shield sleeve, which expands against the wall of the drilled hole when the bolt is tightened, creating a secure hold.
| Application | Machinery, Chemical Industry, Environmental, Building |
| Finish | Color-Zinc Plated |
| Standard | According to Drawing |
| Material | Carbon Steel, Stainless Steel, Brass |
| Coating | Zinc Plated, HDG, etc. |
| Packing | 25 Kgs Per Carton or Gunny Bag, in Pallet. |
| Transport Package | 25kg/Bag or Box, Then Bulk in Pallet. |
| Specification | DIN, GB, Jisb, ISO, ANSI/Asme B, W. S. W |
| Trademark | Donghuang |
| Origin | China |
| HS Code | 731815000 |
| Production Capacity | 8000 Tons Per Year |
The 4PCS Heavy-Duty Shield Expansion Shell Anchors represent a specialized fastening solution engineered for critical construction, industrial machinery, and complex infrastructure projects. Holding one of these anchors, you immediately notice the substantial heft of the ductile iron shield sleeve and the precision-milled threads that ensure smooth engagement without binding. Crafted from high-carbon steel boasting a tensile strength of ≥600MPa, alongside 304/316 stainless steel options for aggressive environments, and solid brass for specialized indoor architectural needs, these anchors deliver uncompromising structural integrity. They strictly comply with international frameworks including DIN 1023, GB/T 15786, ISO 898-1, and ANSI/Asme B 18.5. The advanced conical wedge expansion design provides exceptional heavy-load gripping power while supporting convenient removal, ensuring long-term stability without permanent structural damage. Each set integrates a precisely machined bolt (thread grade 6g), a grade 8 hexagonal nut, a load-distributing flat washer, and a heavy-duty shield sleeve. Backed by a massive 8,000-ton annual production capacity, this line easily fulfills the rigorous demands of large-scale municipal engineering and commercial developments.
Securing 5-20mm steel beams, heavy-duty curtain wall brackets, and critical concrete supports requires a fastener that bites into the substrate with absolute certainty. When driven into C30-C60 concrete or solid brick, the shield sleeve expands uniformly, creating a rock-solid mechanical interlock. For commercial curtain wall installations, these anchors reliably fix 10-ton facade units to concrete cores (requiring a contact area ≥50cm²), strictly complying with seismic intensity 8-degree safety standards. In residential and commercial basement projects, they effectively reinforce foundational elements, such as anchoring anti-crack steel plates, to permanently prevent structural deformation under shifting earth loads.
The rhythmic, relentless vibrations of 5-50 ton heavy industrial equipment—such as CNC lathes, chemical reactors, and industrial fluid pumps—demand anchoring solutions that will not back out over time. These expansion shells lock machinery firmly to concrete foundations with a compressive strength of ≥25MPa. The specialized sleeve design absorbs and resists continuous 50Hz operational vibrations. Specifically, the M16 size configuration delivers a certified pull-out force of ≥15kN, providing an immense safety margin that significantly exceeds standard heavy-equipment installation requirements and reduces long-term maintenance overhead.
Outdoor and harsh chemical environments expose fasteners to rapid degradation, but our specialized coatings ensure lasting stability. In wastewater treatment facilities, the HDG-coated anchors secure 8-ton sedimentation tank equipment, effectively resisting aggressive acidic and alkaline liquid exposure. For municipal infrastructure, these anchors fasten highway guardrails engineered to withstand 10kN lateral impacts, securely mount 50kg overhead road signboards, and stabilize 30kg street lamp bases. The installation process is straightforward, matching standardized sleeve designs with clear procedural steps, which drastically reduces on-site labor hours and minimizes installation errors during large-scale public works.
We engineer these anchors across a spectrum of premium material grades, including high-strength A2-70 and A4-80 fastener classifications. The 316 stainless steel variant, formulated with ≥2% molybdenum, offers exceptional resistance to chloride pitting in coastal marine projects. High-carbon steel variants are optimized for extreme shear and tensile loads, while solid brass options provide an aesthetically pleasing, non-sparking finish for specialized indoor environments. Every material batch undergoes rigorous metallurgical inspection to guarantee performance under stress.
Navigating cross-border engineering specifications is effortless with our certified manufacturing processes. Full compliance with DIN 1023 for European markets and ANSI/Asme B 18.5 for North American applications eliminates compatibility bottlenecks during international project planning. Furthermore, our entire production ecosystem operates under ISO9001, ISO14001, and ISO45001 certifications. Every shipped batch includes a comprehensive Certificate of Compliance (CoC), ensuring full traceability and peace of mind for site inspectors and project engineers.
The surface treatments applied to these anchors create an impenetrable barrier against oxidation. The color-zinc plating provides a durable 5-8 year lifespan for indoor applications, leaving a smooth, iridescent finish. For severe outdoor exposure, the Hot-Dip Galvanized (HDG) coating utilizes 450℃ molten zinc (purity ≥99.95%) to form a thick, wear-resistant metallurgical bond. This HDG layer guarantees 10-15 years of structural integrity in outdoor environments, easily passing stringent 1000-hour salt spray testing protocols per ASTM B117 standards.
Recognizing that project timelines are critical, our logistics and packaging are designed for maximum efficiency. Products are meticulously packed in 25kg moisture-proof reinforced cartons or 50kg heavy-duty gunny bags, then securely strapped to 1000kg ISPM 15-fumigated wooden pallets for safe transit. Leveraging a massive monthly production capacity and strategic port access, we offer flexible minimum order quantities (MOQs) and rapid global delivery within 5-20 days. Urgent small batches (≤500 sets) can be dispatched in just 7-10 days, while large-scale industrial orders (≥10,000 sets) are fulfilled within 15-20 days.
Standard sizes rarely fit every unique engineering challenge, which is why we offer comprehensive dimensional modifications. Project managers can specify exact parameters tailored to their structural requirements:
For example, we frequently engineer custom M20 anchors with a 60mm embedment depth and a 5g thread grade specifically for securing elevator guide rails. We welcome custom runs from specialized small batches to massive industrial volumes, delivering functional prototypes in just 3-5 days.
When standard metals fall short, our advanced metallurgical capabilities step in. We source and machine super duplex stainless steel (2507 grade) for highly corrosive, strong-acid processing facilities, and heat-resistant alloy steel (12Cr1MoV) capable of maintaining tensile strength in power plant environments up to 300℃. Custom surface finishes include Dacromet coatings, which provide an exceptional 1200-hour salt spray resistance without hydrogen embrittlement, as well as color-customizable epoxy resin coatings to match specific architectural aesthetics or safety color-coding requirements.
Every customized fastener is subjected to an uncompromising quality control regimen. We execute strict in-process dimensional checks and 100% finished product testing—including destructive pull-out force evaluations, precise torque limit verifications, and accelerated salt spray corrosion tests—all strictly adhering to ISO 898-1 methodologies. For critical infrastructure requiring absolute safety redundancies, such as nuclear power plant auxiliaries or aerospace ground support equipment, we partner with authoritative third-party laboratories (including SGS and CTI) to provide independent, verifiable testing reports.
