Carbon Steel Hex Head Sleeve Anchors | Heavy Duty Concrete Expansion Bolts

Product Highlights

• High-Load Sleeve Expansion: Features a heavy-duty cold-stamped steel sleeve that expands uniformly inside the concrete matrix under torque, delivering reliable gripping force for high-load heavy construction.
• Corrosion-Resistant Zinc Plating: Coated with a premium yellow/white electro-galvanized zinc layer, providing excellent daily rust defense and steady weather resistance for construction sites across Southeast Asia.
• Integrated Hex Head System: Designed with an external hex bolt head pre-assembled with a flat washer, ensuring tight clamping pressure distribution and effortless torque application with standard mechanical tools.
• Flush Wall Versatility: Perfect for through-fixing engineering methods; the anchor can be hammered directly through the fixture into the concrete hole, significantly accelerating on-site installation schedules.
• Anti-Slipping Sleeve Flutes: The expansion sleeve features engineered longitudinal slits and textures that bite deeply into the masonry hole wall, preventing anchor rotation during tightening.

Product Specifications

📦 Packing & Logistics Data

• Standard Bulk Packaging: Packed in 25 kg reinforced 5-layer industrial corrugated boxes, stacked tightly on heavy-duty non-fumigation wooden pallets (approx. 1 to 1.2 metric tons per pallet).
• Moisture-Proof Transit Seal: Each carton box uses an inner high-density waterproof plastic liner to securely lock out tropical marine humidity during shipping routes across Southeast Asian waters.
• Distributor Inner Boxes: Supports low-volume inner box sorting setups (e.g., 20/50/100 pieces per retail box) printed with private B2B barcode logistics labels and customized brand graphics.
• FCL Container Capacity: Yields 20 to 25 metric tons per 20ft container (20GP), precisely optimized to max out legal cargo thresholds at destination ports from Tianjin Port to Bangkok, Manila, or Jakarta.

Manufacturing Standards & Dimension Correspondence

We maintain strict engineering boundaries ±0.02m to match international structural drilling sizes:

• Drill Hole Correspondence: M6 Sleeve Anchor → Drill diameter 8mm, M8 Sleeve Anchor→ Drilling diameter 10mm, M10 Sleeve Anchor→ Drilling diameter 12mm , M12 Sleeve Anchor → Drilling diameter 16mm.
• Sleeve Thickness Gauge: Engineered to prevent premature sleeve crushing or buckling before the bottom cone expands, ensuring predictable torque response.
• Clean Thread Clearance: Precision 6g bolt threads guarantee that nuts and washers turn smoothly by hand prior to tool engagement.

Application Scenarios

Widely applied in building construction projects, concrete floor framing installations, steel structure warehouse post-bases, industrial machinery mounting lines, heavy shelving rack anchors, and outdoor municipal gate/railing frameworks. Specially designed to provide a high-tensile, steady anchoring platform inside solid concrete, structural brickwork, or dense masonry blocks across tropical industrial projects.

Why Choose Us?

• Direct Handan Factory Supply Base: Situated in China's ultimate fastener manufacturing cluster in Handan, Hebei. We offer clear factory-direct pricing with no trading agency markups to support your wholesale pricing edge.
• Automated Cold-Forging Line Quality: Cold-forged with high-speed automated equipment to ensure that each bolt head and sleeve part displays excellent dimensional stability and flaw-free surfaces.
• 100% Structural Quality Audits: Our engineering facility checks structural load limits, hardness values, and plating thickness consistency on every production run.
• Flexible Sourcing Adjustments: Swift adjustment options on specialized non-standard lengths, custom private head stampings, and matching component sorting kits.

Commercial & Sourcing Terms

• MOQ (Minimum Order Quantity): 100 pieces for standard ready-to-ship sizes kept in active warehouse inventory. A baseline MOQ of 1,000 pieces per size applies for custom production metrics.
• Tiered Wholesale Pricing Matrix: Factory-direct wholesale discounts adjusted to your dynamic purchasing volume (1,000–19,999 pcs / 20,000–99,999 pcs / ≥ 100,000 pcs).
• Production Lead Times: 7–10 days for inventory standard sizes; 15–20 days for continuous manufacturing runs requiring customized packaging formats.
• Accepted Payment Frameworks: T/T (Telegraphic Transfer), Irrevocable L/C at sight, or PayPal for sample evaluation tests.

Frequently Asked Questions

Q1: What is the main difference between a sleeve anchor and a heavy-duty wedge anchor? A

: Wedge anchors require highly precise hole sizing and only work well in solid, hard concrete. Sleeve anchors are more versatile because their wider expansion sleeve distributes clamping force across a broader area. This makes them significantly safer and more reliable for base materials with slightly lower density, such as hollow brick, masonry blocks, or older concrete surfaces.

Q2: Can these carbon steel zinc-plated sleeve anchors be used in outdoor maritime settings?

A: Yellow or white zinc electro-plating is highly effective for indoor assemblies, dry structural areas, and general outdoor construction shielding. However, for continuous exposure to high-salinity coastal spray or chemical processing zones, we highly recommend upgrading to our hot-dip galvanized carbon steel series or marine-grade stainless steel anchors to achieve a longer rust-free asset lifespan.

Q3: How do I choose the correct drill bit size for these hex sleeve anchors?

A: Unlike standard bolts, you must select a drill bit that matches the outer diameter of the sleeve ($D$), not the inner bolt thread size. For instance, our M8 anchor size utilizes a 10mm outer sleeve, meaning you must drill a 10mm diameter hole into the concrete substrate for a proper interference fit.

---

We support full product customization, sample testing, and flexible batch orders with strict quality assurance and on-time delivery.

Contact us now to get a free tailored quote and professional technical support!

• Factory Name: Hotop Fasteners
• Address: Handan, Hebei, China
• Phone Support: +86 15632029222
• Email Support: [email protected]