Product Details
Product Description
China factory direct supply zinc plated countersunk head self-drilling screws for wholesale. These screws feature a flat head design that sits flush with the surface, providing a clean finished appearance. The self-drilling point eliminates the need for pre-drilling, saving time and labor costs. Zinc plating offers good corrosion resistance for indoor applications. Perfect for metal framing, woodworking, and general construction projects. Bulk discounts available for distributors and contractors.
Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Standard | DIN 7504K, ANSI B18.6.1 | Thread Type | Self-Tapping |
| Head Type | Countersunk (Flat Head) | Point Type | Self-Drilling Point (Type BSD) |
| Drive Type | Phillips #2 | Material | Medium Carbon Steel |
| Finish | Zinc Plated | Hardness | 45-52 HRC |
| Tensile Strength | 1000 MPa | Corrosion Resistance | Salt spray test 96 hours |
| Point Sizes | #2, #3, #4 available | Drive Compatibility | Standard & Impact Drivers |
Product Size (Popular Specifications)
Common specifications for global markets:
| Diameter (mm) | Diameter (Inch) | Length (mm) | Length (Inch) | Drive Type |
|---|---|---|---|---|
| 3.5 mm | #6 | 16 mm | 5/8″ | Phillips #2 |
| 4.2 mm | #8 | 25 mm | 1″ | Phillips #2 |
| 4.8 mm | #10 | 32 mm | 1-1/4″ | Phillips #2 |
| 5.5 mm | #12 | 38 mm | 1-1/2″ | Phillips #2 |
| 6.3 mm | 1/4″ | 50 mm | 2″ | Phillips #2 |
Note: Custom sizes and drive types available for bulk orders
Application Scenarios
Our countersunk self-drilling screws provide a fast, reliable solution for professional fastening. Their self-drilling design and flush finish make them ideal for a wide range of applications.
Key Industries and Uses
- Steel Framing: For fastening steel track to studs in interior wall systems.
- HVAC Ductwork: Ideal for assembling and hanging sheet metal ducts.
- Sheet Metal Fabrication: Used in assembling cabinets, enclosures, and machine guards.
- Metal-to-Metal Fastening: A versatile choice for joining sheet metal in OEM and manufacturing.
- Industrial Maintenance: Securing brackets, conduits, and equipment in plant environments.
Frequently Asked Questions (B2B-oriented)
A: Our standard self-drilling screws are manufactured from 1022 carbon steel, case-hardened to achieve a surface hardness of HRC 50-55 on the drill point for reliable penetration. We can provide full Material Test Certifications (MTC) per EN 10204 / 3.1 standard for traceability and quality assurance on request, which is crucial for quality-critical industrial fastening projects.
A: The standard zinc plating we offer provides a basic level of corrosion resistance, ideal for indoor applications or environments with minimal exposure. For outdoor construction projects or more corrosive settings (e.g., certain industrial or coastal areas), we strongly recommend our Geomet coated self-drilling screws or other heavy-duty coatings for enhanced protection. Our team can help you select the right finish.
A: Absolutely. As a factory-direct supplier, we specialize in OEM self drilling screw customization. This includes non-standard lengths and diameters, different drive types (e.g., Pozidriv), and custom packaging or private labeling for bulk orders. Contact us with your specifications for a tailored solution.
A: For standard items, our lead time for a high-volume order is typically 15-30 days. For custom-made products, it depends on the order quantity and specifications. We pride ourselves on reliable on-time delivery for bulk procurement and will provide a firm timeline with your quote.
A: Our MOQ is flexible to accommodate growing businesses, typically starting from 1,000 pieces for standard items. We absolutely provide volume-based pricing discounts for large quantity orders. The more you order, the more competitive the unit price becomes. Request a formal quotation to see the savings.
A: Our manufacturing process is designed to meet international standards, including ISO 9001 for quality management. We perform rigorous in-process inspections and final Random Sample Checks to ensure consistent performance, which is essential for reliable construction and industrial fastener supply.