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As a reliable supplier from Hefei SENOTECH New Materials Co., Ltd (established in 2020, with annual export value of US$1-1.5 million), we are proud to introduce our Free Samples Through Bolt SS304 ETA Approved Long Thread High Hardness Full Sizes Available. This product combines superior material quality with rigorous certification, offering you a fastening solution that meets the highest European technical standards. Whether you are in construction, industrial assembly, or infrastructure projects, our through bolts deliver exceptional performance and durability.
Our through bolts are manufactured from SS304 stainless steel, known for its excellent corrosion resistance and mechanical strength. The ETA (European Technical Assessment) approval ensures that each bolt complies with strict European construction product regulations, giving you confidence in safety and reliability. The long thread design provides enhanced grip and load distribution, while the high hardness (achieved through precise heat treatment) resists deformation under heavy loads. We offer full sizes to accommodate diverse project requirements, and free samples are available for you to test before bulk purchase.
Key Features & Benefits
- SS304 Material: Excellent corrosion resistance in outdoor and humid environments, suitable for marine, chemical, and industrial applications.
- ETA Approved: Meets European technical requirements for structural fasteners, ensuring compliance with local building codes.
- Long Thread: Provides greater engagement length, reducing the risk of loosening and improving load capacity.
- High Hardness: Heat-treated to achieve hardness levels up to HRC 28-32, offering superior wear resistance and strength.
- Full Sizes Available: Diameters from M3 to M30, lengths from 16mm to 500mm, and custom lengths upon request.
- Free Samples: Test the quality and fit before committing to large orders, reducing your procurement risk.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | Stainless Steel 304 (A2-70) |
| Thread Standard | DIN 933, ISO 4014 (metric coarse thread) |
| Hardness | HRC 28-32 (customizable) |
| Tensile Strength | ≥ 700 MPa |
| Yield Strength | ≥ 450 MPa |
| Certification | ETA (European Technical Assessment) |
| Surface Treatment | Passivated, Plain, or Custom (e.g., Dacromet) |
| Available Sizes | M3 – M30 (full range), lengths up to 500mm |
Product Advantages
- Enhanced Safety: ETA approval guarantees the bolt meets the essential requirements for structural applications, reducing liability risks.
- Cost-Effective: Long thread design minimizes the need for additional washers or nuts, and high hardness extends service life, lowering overall maintenance costs.
- Versatile Application: Suitable for steel structures, concrete anchors, bridge construction, and heavy machinery assembly.
- Easy Installation: Standard metric thread allows compatibility with common tools and nuts.
- Customization: We can tailor lengths, diameters, and coatings to match your specific project needs.
At Hefei SENOTECH New Materials Co., Ltd, we have been serving global clients since 2020, with annual export values reaching US$1-1.5 million. Our products are trusted in markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We maintain strict quality control to ensure every batch of through bolts meets the highest standards. Our team provides responsive customer service, timely delivery, and flexible packaging options.
We invite you to request free samples to experience the quality firsthand. With our competitive pricing, full size availability, and ETA approval, you can confidently source your fastening requirements from us. Contact us today to discuss your needs or place an order. Let us be your trusted partner in structural fastening solutions.
Frequently Asked Questions
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Q: Are free samples really free? What is the shipping cost?
A: Yes, we provide free samples of the bolts. You only need to pay the shipping cost, which can be arranged via your preferred courier or we can quote a discounted rate. -
Q: What does ETA approval mean for my project?
A: ETA (European Technical Assessment) means the product has been tested and assessed according to European standards for construction products, ensuring its performance, safety, and reliability in structural applications. -
Q: Can you provide custom sizes not listed in the standard range?
A: Absolutely. We offer customization for diameter, length, and thread specifications. Please provide your requirements, and we will confirm feasibility and lead time. -
Q: What is the hardness level of these bolts? Is it suitable for high-strength applications?
A: The standard hardness is HRC 28-32, which is suitable for most structural and heavy-duty applications. Higher hardness levels are available upon request for specialized uses. -
Q: How long is the delivery time for bulk orders?
A: For standard sizes, delivery is typically 15-25 days after order confirmation. Customized products may require 25-35 days. We always aim to meet your project schedule. -
Q: Do you have stock for all sizes? What if I need a small quantity?
A: We maintain an inventory of popular sizes. For full sizes, we can produce small quantities as well. Free samples are always available for testing. -
Q: What is the packaging for export?
A: Standard packaging is in cartons or pallets, with plastic bags inside to prevent moisture. Custom packaging (e.g., branded boxes, barcode labels) is available upon request. -
Q: Can I inspect the quality before shipment?
A: Yes, we welcome third-party inspections or we can provide photos/videos of the production and testing process. We also offer a quality certificate with each batch.
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