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Help CenterFactory Direct Self Drilling Screw C1022A Carbon Steel Yellow Zinc Hex Head for Metal Roofing Fast Drilling Full Sizes Available
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Hefei SENOTECH New Materials Co., Ltd proudly introduces our Factory Direct Self Drilling Screw C1022A Carbon Steel Yellow Zinc Hex Head — engineered specifically for fast and reliable fastening on metal roofing applications. Manufactured from high-grade C1022A carbon steel with a durable yellow zinc coating, these screws offer exceptional corrosion resistance and driving performance. As a trusted trading company with annual exports exceeding US$1 million and a global reach spanning North America, South America, Europe, Asia, Africa, and Oceania, we ensure consistent quality and competitive factory-direct pricing. Whether you need standard sizes or custom specifications, our full-size inventory and flexible supply capabilities make us your ideal partner for roofing fasteners.
Key Features & Benefits
- Fast Drilling Design: The hardened drill point penetrates metal sheets quickly without pre-drilling, saving installation time and labor costs.
- Hex Head Geometry: Hexagonal head provides excellent torque transfer and prevents cam-out, ensuring secure tightening with standard power tools.
- Yellow Zinc Coating: Offers enhanced corrosion resistance against moisture, UV, and harsh weather conditions, extending service life in roofing environments.
- C1022A Carbon Steel: Medium carbon content delivers optimal hardness and tensile strength while maintaining ductility to avoid brittleness.
- Full Sizes Available: From small diameters for light-gauge metal to larger sizes for heavy-duty roofing panels — we stock a complete range to meet diverse project needs.
- Factory Direct Supply: Eliminate middlemen, reduce costs, and benefit from direct technical support and customization options.
| Parameter | Details |
|---|---|
| Material | C1022A Carbon Steel (case hardened) |
| Surface Treatment | Yellow Zinc Plating (trivalent or hexavalent per request) |
| Head Type | Hexagon (standard hex washer head) |
| Drilling Type | Self-drilling point ( #2, #3, #4 or custom ) |
| Thread Type | Full thread (self-tapping) / partial thread available |
| Standard Sizes | From #8 to 1/4 inch diameter, lengths 3/4" to 3" (metric sizes upon request) |
| Drilling Capacity | Up to 0.125" (3mm) steel sheet per drilling point |
| Packing | Plastic boxes, cartons, or bulk pallets |
Technical Advantages for Metal Roofing
Our self-drilling screws are designed to penetrate metal roofing panels and underlying structures in one operation. The sharp drill bit and optimized thread geometry reduce heat buildup and prevent stripping. The yellow zinc coating acts as a sacrificial layer, protecting the steel substrate even in coastal or industrial environments. Additionally, the hex head allows for high torque driving without slipping, which is critical when attaching panels to purlins or battens. Every batch undergoes hardness testing (HV 300-400) and coating thickness verification to ensure consistent performance.
Why Choose Hefei SENOTECH?
Since 2020, we have been serving global clients with high-quality fasteners. With an annual export value of US$1-1.5 million, we have established reliable supply chains across 10+ regional markets including the Americas, Europe, Africa, and Oceania. Our factory-direct model ensures competitive pricing, while our dedicated quality control team conducts dimensional, mechanical, and corrosion tests on every production lot. We offer flexible packaging options (bulk, retail-ready boxes, custom labeling) and can accommodate OEM/private label requests. For urgent projects, our full-size stock enables rapid shipment within 7-15 days.
FAQs
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Q: What is the drilling capacity of these screws?
A: The standard drill point can penetrate steel sheets up to 3mm (0.125") thickness. For thicker materials, we offer custom points with higher hardness. -
Q: Are these screws suitable for wooden substrates?
A: They are primarily designed for metal-to-metal fastening. For wood, we recommend our wood screw series with sharp cutting threads. -
Q: Can I get samples before bulk order?
A: Yes, we provide free samples (freight collect) for qualified buyers. Contact our sales team to discuss your requirements. -
Q: What colors are available?
A: Yellow zinc is standard, but we can also supply white zinc, black phosphate, or custom coatings upon request (minimum order quantity applies). -
Q: How are these screws packaged for export?
A: Standard packing: plastic boxes or poly bags inside strong cartons, then palletized and shrink-wrapped. Custom labeling and display boxes are available. -
Q: What is the lead time for bulk orders?
A: For standard sizes, 7-15 days after confirmation. For special sizes or coatings, 20-30 days depending on quantity. -
Q: Are these screws RoHS compliant?
A: Yes, our yellow zinc plating can be produced with trivalent chromium process to meet RoHS requirements. Please specify when ordering. -
Q: Do you provide technical datasheets?
A: Absolutely. We will provide detailed product specifications, test reports, and installation guide upon request.
With a strong track record of exporting to diverse markets and a commitment to quality, Hefei SENOTECH New Materials Co., Ltd is your reliable partner for self-drilling screws. Our full-size inventory, factory-direct pricing, and responsive customer service ensure that you receive the right product on time. Contact us today for a quote or sample request — let us help you fasten your metal roofing projects with confidence.
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