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Help CenterWholesale Price Drilling Screws for Metal Roofing With Dacromet Coating Hex Head Full Sizes
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As a professional fastener supplier based in Hefei, Anhui, China, Hefei SENOTECH New Materials Co., Ltd has been dedicated to providing high-quality fastening solutions since 2020. Our wholesale price drilling screws for metal roofing with Dacromet coating are engineered to meet the rigorous demands of modern construction and roofing projects. These hex head self-drilling screws combine superior corrosion resistance with full-size availability, ensuring you find the perfect fastener for every application. With an annual export value exceeding US$1 million and a global reach spanning North America, Europe, Asia, and beyond, we are your trusted partner for cost-effective, reliable roofing fasteners.
Our Dacromet coating provides exceptional protection against rust and oxidation, even in harsh outdoor environments. The hex head design allows for high-torque installation using standard power tools, saving labor time and reducing installation costs. Plus, the integrated drill point eliminates the need for pre-drilling, making these screws ideal for metal-to-metal fastening on roofing panels, gutters, and flashing. Available in a wide range of diameters and lengths, our full-size inventory ensures you can source all your requirements from a single supplier.
Below is a detailed overview of the key technical specifications:
| Parameter | Details |
|---|---|
| Available Sizes (Diameter) | #12, #14, 1/4″ (other sizes available upon request) |
| Length Range | 1″ (25mm) to 3″ (76mm), with intermediate lengths |
| Coating Thickness | Standard Dacromet (customizable for specific environments) |
| Drill Point Type | #2 or #5 point (depending on thickness of material) |
| Head Drive | Hex socket (5/16″ or 1/4″ hex bit compatible) |
| Hardness | Case hardened to ensure drill performance |
| Applicable Steel Thickness | Up to 1/4″ (6mm) total thickness |
Key Features and Benefits
- Premium Dacromet Coating – Provides excellent corrosion resistance, passing 200+ hours in salt spray tests (laboratory conditions). Ideal for coastal and high-humidity regions.
- Self-Drilling Tip – Eliminates the need for pilot holes, reducing installation time by up to 50% compared to traditional screws.
- Hex Head Design – Enables high-torque fastening without cam-out, ensuring secure and consistent connections.
- Full Size Range – From #12 to 1/4″ diameter and 1″ to 3″ length, we offer all common sizes for metal roofing applications.
- Cost-Effective Wholesale Pricing – Factory-direct supply allows us to offer competitive prices without compromising quality.
- Wide Compatibility – Suitable for steel thicknesses up to 6mm, including single-skin and sandwich panel roofing systems.
- Consistent Quality – Every batch is inspected for thread accuracy, coating integrity, and hardness before shipment.
Our screws are manufactured using high-grade carbon steel and undergo a strict hardening process to achieve the optimal balance of hardness and toughness. The Dacromet coating is applied using a dip-spin process that ensures uniform coverage even in the thread roots, eliminating weak points for corrosion. This makes our screws particularly suitable for metal roofing in agricultural, industrial, and residential buildings.
We understand that every project has unique requirements. That’s why we offer customizable options including different drill points (e.g., #3 for thicker materials), custom lengths, and modified coating thickness. Our experienced sales team can help you select the right specification for your application.
Trust & Reliability
Since our establishment in 2020, Hefei SENOTECH New Materials Co., Ltd has built a strong reputation for delivering quality fasteners to global markets. With an annual export value of US$1 - US$1.5 million, we serve clients in over 30 countries including the United States, Canada, Germany, Australia, and Southeast Asia. Our main markets cover North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, East Asia, Western Europe, Central America, Northern Europe, Southern Europe, and South Asia. This widespread distribution proves the global acceptance of our products.
We operate a streamlined supply chain that enables fast delivery – typical lead time is just 15-30 days depending on order quantity and customization level. Our quality control procedures ensure that every shipment meets your expectations. We also provide OEM/ODM services for clients who need branded packaging or specialized dimensions.
If you are looking for a reliable partner for your metal roofing fastener needs, we invite you to contact us for a quote or sample. Our team is ready to assist with product selection, technical support, and logistics coordination. Choose Hefei SENOTECH for competitive wholesale prices, comprehensive size ranges, and a commitment to quality that stands behind every screw.
Frequently Asked Questions (FAQ)
-
Q: What is the maximum metal thickness these screws can drill through?
A: Our standard #2 drill point can penetrate up to 1/8″ (3mm) steel, while the #5 point can handle up to 1/4″ (6mm). For thicker materials, we recommend using a different point or pre-drilling. -
Q: Are these screws suitable for outdoor use in coastal areas?
A: Yes, the Dacromet coating provides excellent corrosion resistance and is commonly used in coastal and industrial environments. However, for extreme conditions, we can apply additional topcoats upon request. -
Q: Do you offer samples before bulk order?
A: Absolutely. We can send samples of various sizes for your evaluation. Please contact us with your specific requirements, and we will arrange shipment. -
Q: What is the minimum order quantity (MOQ)?
A: For stock sizes, MOQ is typically 5,000 pieces per size. Custom sizes or special coatings may require higher MOQs. Please inquire for exact numbers. -
Q: How are the screws packaged?
A: Standard packaging is in bulk cartons (25-50 lbs per carton) or smaller boxes (1,000 pieces per box). We also offer private label packaging and customized retail-ready boxes. -
Q: What is the typical lead time?
A: For standard sizes, lead time is around 15-20 days after order confirmation. Custom orders may take 25-30 days. Rush orders can be accommodated for an additional fee. -
Q: Do you provide a warranty?
A: We stand behind the quality of our screws. If any batch fails to meet specifications due to manufacturing defects, we will replace it. Please review our warranty terms with your sales representative. -
Q: Can I get screws in different colors?
A: The Dacromet coating naturally appears silver-gray. We do not offer painted colors for this type of coating, but we can provide alternative coatings (e.g., zinc plating, black phosphate) if needed.
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