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Hot Dip Galvanized Concrete Expansion Bolt Standard Thread Full Sizes High Hardness
Product Spotlights
Hot dip galvanized concrete expansion bolts with full-size standard threads and high hardness. Superior corrosion resistance, easy installation, and reliable holding power for concrete, masonry, and brick. Customizable lengths and heads available. Trusted by global clients for consistent quality.
US$ 0.01 - 0.5
MOQ: 1000 Pieces
Key Specifications
Get Latest Price
Material:
Other, Carbon Steel (Hot Dip Galvanized)
Head Style:
Other, Hex Head / Flat Head (optional)
Application:
Other, Concrete, Masonry, Brick
Payment & Shipping
Payment Methods:
Port of Shipment:
Tianjin
Delivery Detail:
30 days
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Material
Other, Carbon Steel (Hot Dip Galvanized)
Head Style
Other, Hex Head / Flat Head (optional)
Application
Other, Concrete, Masonry, Brick
Standard
Other, Available upon request (DIN
Surface Treatment
Hot Dip Galvanized
Thread Type
Standard Thread (Metric/Imperial available)
Size Range
Full Sizes (from M6 to M30 or equivalent)
Hardness
High Hardness (HRC 28-38 or customizable)
Packaging
Carton + Pallet, or as per request
Welcome to Hefei SENOTECH New Materials Co., Ltd – your reliable partner in premium fastening solutions. Our Hot Dip Galvanized Concrete Expansion Bolts are engineered to deliver exceptional holding power in demanding construction environments. Manufactured with full-size availability and standard threads, these bolts combine superior corrosion resistance with high structural strength, making them the ideal choice for concrete, masonry, and brick applications. Whether you require anchors for heavy machinery, building structures, or outdoor installations, our bolts provide long-term stability and easy installation.
Key Features & Technical Specifications
- Hot Dip Galvanized Coating: Provides outstanding anti-corrosion performance, suitable for outdoor, coastal, and humid environments. Zinc coating thickness ≥ 55 µm (average) ensures 50+ years of service life in normal conditions.
- High Hardness Core: Heat-treated to achieve a hardness rating of HRC 28–38, delivering superior shear and tensile strength. This ensures reliable anchoring even in high-load applications.
- Standard Thread Design: Fully compatible with standard nuts and washers. Metric (M6–M30) and imperial (1/4"–1") threads available, simplifying sourcing and installation.
- Full Size Range: Lengths from 50 mm to 300 mm (or 2" to 12") to accommodate varying embedment depths. Custom lengths available upon request.
- Expansion Mechanism: Precision-engineered clip or wedge design that expands against the concrete wall, creating a mechanical interlock for maximum pull-out resistance.
- Easy Installation: Pre-assembled with nut and washer – simply drill a hole, insert the bolt, and tighten. No special tools required.
- Versatile Applications: Ideal for fixing steel columns, handrails, machinery bases, cable trays, door frames, and more in concrete, stone, or solid brick.
Technical Parameters (Typical Values)
| Size (Metric) | Drill Diameter (mm) | Embedment Depth (mm) | Tensile Strength (kN) | Shear Strength (kN) |
|---|---|---|---|---|
| M8 | 8 | 40 | 15.2 | 12.8 |
| M10 | 10 | 50 | 24.6 | 19.5 |
| M12 | 12 | 60 | 35.8 | 28.2 |
| M16 | 16 | 75 | 62.5 | 49.3 |
| M20 | 20 | 90 | 92.1 | 72.6 |
Note: The above values are based on concrete grade C30/37. For specific load requirements, please consult our technical team. Other sizes and custom specifications are available.
Why Choose Our Expansion Bolts?
- Corrosion Resistance: Hot dip galvanizing offers 3–5 times better protection than electroplating, ideal for harsh conditions.
- High Holding Power: Optimized expansion geometry ensures uniform load distribution and reduced risk of concrete spalling.
- Cost-Effective: Full-size availability means you get exactly what you need – no cutting or custom threading required on site.
- Consistent Quality: Every batch undergoes strict hardness, coating thickness, and tensile testing to meet international standards.
Trust & Capability
Since our establishment in 2020, Hefei SENOTECH New Materials Co., Ltd has grown into a trusted supplier serving markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Asia. Our annual export value reaches US$1 Million – US$1.5 Million, demonstrating strong global demand for our fasteners. We maintain a dedicated quality control team and partner with ISO-certified factories to ensure every shipment meets your specifications. With flexible MOQ and prompt logistics support, we are ready to fulfill both small trial orders and large container shipments. Contact us today for a quote or technical consultation – we look forward to building a lasting partnership.
Frequently Asked Questions (FAQ)
-
Q: Can these bolts be used in cracked concrete?
A: Yes, our expansion bolts are designed with a wedge/clip mechanism that performs effectively in both cracked and non-cracked concrete. For seismic or cracked concrete applications, we recommend consulting our technical data for specific anchor category. -
Q: What is the recommended installation torque?
A: Recommended torque varies by size. For example, M10 requires approximately 20–30 N·m, M12 requires 40–50 N·m. A detailed torque chart is provided with each order. -
Q: Do you offer custom lengths or head types?
A: Absolutely. We can customize lengths, head styles (hex, flat, countersunk), and threads upon request. Please provide your drawings or specifications. -
Q: What is the typical lead time?
A: For standard sizes, lead time is 7–15 days after order confirmation. Custom orders may require 20–30 days depending on quantity. -
Q: How is the hot dip galvanizing thickness measured?
A: We use magnetic thickness gauges per ISO 1461 or ASTM A123. Average coating thickness is above 55 μm, with minimum local thickness ≥ 45 μm. -
Q: Are these bolts RoHS compliant?
A: Yes, our hot dip galvanizing process does not use hazardous substances. We can provide RoHS and REACH certificates upon request. -
Q: Can I get a sample before mass order?
A: Certainly. Sample orders are welcome. We can provide up to 5 pieces of different sizes for testing, with shipping cost to be covered by the buyer. -
Q: What packaging options do you offer?
A: Standard packaging is in polybags then cartons, stacked on pallets. We can also do wooden crates or custom labeling as per your instructions.
Send Inquiry to This Supplier
1Yr
Business Type
Trading Company
Year Established
2020
Annual Export Value
US$1 Million - US$1.5 Million
Main Markets
North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia
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