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Help CenterFactory Direct Concrete Expansion Bolt Wholesale Price Free Samples Full Sizes Available
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As a trusted supplier from Hefei SENOTECH New Materials Co., Ltd (established 2020), we take pride in offering factory direct concrete expansion bolts at wholesale prices. Our full range of sizes, from M6 to M24, ensures you find the exact fit for your anchoring needs. With an annual export value of US$1–1.5 million and shipping to over 12 global markets, we deliver quality and cost-effectiveness straight from the source.
These expansion bolts are engineered for secure fastening into solid concrete, brick, and block substrates. The unique wedge design expands against the base material when the nut is tightened, providing a strong and reliable hold. Available in carbon steel (zinc plated or hot dip galvanized) and stainless steel, they resist corrosion and perform in both indoor and outdoor environments.
We understand that every project has unique requirements. That's why we offer free samples for evaluation and full size availability – from M6 to M24, with lengths from 30mm to 200mm. Whether you need a small batch for a DIY job or bulk shipments for commercial construction, our flexible packaging and quick turnaround ensure you get what you need, when you need it.
Key Features & Technical Specifications
- Wedge expansion design – ensures a tight, vibration-resistant anchor in solid concrete.
- Material options: Carbon steel (Grade 4.8/8.8) with zinc plating (blue/white/yellow) or hot dip galvanized; Stainless steel (SS304/SS316) for high-corrosion environments.
- Full size range: Diameters M6 (1/4"), M8 (5/16"), M10 (3/8"), M12 (1/2"), M16 (5/8"), M20 (3/4"), M24 (1") – lengths from 30mm to 200mm.
- High load capacity: Tensile and shear values meet or exceed industry standards (DIN, ASTM, BS – upon request).
- Easy installation: Simply drill a hole to the specified depth, insert the bolt, and tighten the nut. No special tools required.
- Versatile applications: Ideal for steel structures, handrails, machinery mounting, racking systems, electrical conduits, and more.
- Custom packaging: Available in boxes, poly bags, or bulk cartons – we label per your requirements.
Product Dimensions & Load Ratings (Typical Values)
| Diameter (mm) | Drill Hole (mm) | Embedment Depth (mm) | Tensile Load (kN) * | Shear Load (kN) * |
|---|---|---|---|---|
| M6 | 6 | 25 | 4.2 | 6.5 |
| M8 | 8 | 30 | 7.5 | 11.0 |
| M10 | 10 | 40 | 12.0 | 17.0 |
| M12 | 12 | 50 | 18.0 | 26.0 |
| M16 | 16 | 65 | 35.0 | 48.0 |
| M20 | 20 | 80 | 55.0 | 75.0 |
* Values are approximate for carbon steel grade 4.8 in C20/25 concrete. Always check local codes and perform on-site testing.
Why Choose Hefei SENOTECH Concrete Expansion Bolts?
- Factory direct pricing – Eliminate middlemen and save up to 30% compared to distributor prices.
- Free samples – Test our quality before committing to large orders. Request samples for any size.
- Full size availability – From M6 to M24, we stock all common diameters and lengths. No minimum order quantity for standard sizes.
- Rigorous quality control – Each batch is inspected for dimensional accuracy, hardness, and plating thickness. Our rejection rate is less than 0.5%.
- Flexible shipping options – We work with major freight forwarders (FCL, LCL, air freight) to deliver to North America, South America, Europe, Asia, Africa, and Oceania.
- Experienced export team – Since 2020, we have exported over US$1 million annually and served customers in 12+ regions. Your inquiries will receive prompt, professional responses.
Trust & Reliability
Hefei SENOTECH New Materials Co., Ltd has been serving global buyers since 2020. With an annual export value of US$1–1.5 million, we have built a reputation for consistent quality and reliable delivery. Our main markets span across North America, South America, Europe, Asia, Africa, and Oceania – proof of our international capability. We are committed to providing factory direct concrete expansion bolts at competitive wholesale prices without compromising on performance. Plus, we offer free samples so you can verify the quality firsthand.
Whether you are a distributor looking for a steady supply or a contractor needing a specific size for a project, we are here to help. Browse our sizes and request a sample today – experience the SENOTECH difference.
Frequently Asked Questions (FAQ)
-
What materials are used for your concrete expansion bolts?
We offer carbon steel (grade 4.8 or 8.8) with zinc plating or hot dip galvanizing, and stainless steel (SS304/SS316). The zinc plating provides good corrosion resistance for indoor use, while hot dip galvanized or stainless steel is recommended for outdoor or high-humidity environments. -
What sizes are available?
We stock diameters from M6 (1/4") to M24 (1") and lengths from 30mm to 200mm. If you need a size not listed, we can discuss custom production for volume orders. -
Can I get free samples before placing a bulk order?
Yes, we provide free samples for evaluation. You only need to cover shipping costs (or we can arrange a courier collection). Contact us with your required sizes and quantities. -
How do I install a concrete expansion bolt properly?
Drill a hole in concrete to the specified depth (see table above), clean the hole, insert the bolt, and tighten the nut until the required torque. The wedge expands against the hole wall, creating a secure grip. Always follow local safety guidelines. -
What are the load capacities of these bolts?
Load capacities depend on concrete strength, embedment depth, and bolt grade. The table above gives typical values for carbon steel grade 4.8 in C20/25 concrete. For precise data, we can provide test reports upon request. -
Do you offer custom packaging or labeling?
Yes, we can pack in boxes, poly bags, or bulk cartons, and add your logo or product label. Minimum quantities may apply for custom packaging. -
What is the minimum order quantity (MOQ)?
For standard sizes, there is no MOQ – we can supply small quantities for trials. For large orders (e.g., full container), we offer volume discounts. -
How long does shipping take to international destinations?
Typical lead times: 7–15 days for samples (by courier), 20–35 days for bulk LCL/FCL orders. We work with reliable carriers to ensure timely delivery to all major ports.
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