WhatsApp/Wechat: +86 15176702681
ADD: Yuelong Town Industrial Park, Tianjin, China
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Product Introduction
Our zinc-plated flat head self-drilling screws are designed for fast, high-strength fastening in metal construction and manufacturing. They combine drilling, tapping, and fastening functions in one step, eliminating the need for pre-drilling and significantly improving work efficiency. Made from high-strength carbon steel and treated with a high-quality zinc plating, these screws offer reliable corrosion resistance and superior performance, suitable for connecting thin to medium-thick metal sheets, steel frames, and other substrates. The flat head countersunk design provides a flush and smooth surface finish, ideal for applications requiring a smooth surface. It's a cost-effective and time-saving solution for HVAC, metal framing, roofing, and general industrial assembly.
Product Specifications
| Parameter | Specification |
|---|---|
| Material | High-Carbon Steel (Grade 1022A), Heat-Treated |
| Finish / Coating | Electro-Zinc Plated (Yellow Zinc, Blue Zinc, or White Zinc). Optional Trivalent Chromate Passivation for enhanced corrosion protection. |
| Corrosion Resistance | Standard: Meets ASTM B633, SC3 (72+ hours salt spray test). Enhanced options available. |
| Head Style | 82° Flat Countersunk Head (100° also available) |
| Drive Type | Phillips (PH2/PH3), Pozidriv (PZ2/PZ3), or Hex Washer Head (HWH) compatible |
| Drill Point Style | #2 Point (≤ 12 Ga.), #3 Point (≤ 10 Ga.), #4 Point (≤ 1/4"), #5 Point (≤ 3/8") |
| Thread Type | Fine Thread, Spaced Thread, or Hi-Lo Thread options |
| Shank | Fully Threaded or Partial Thread |
| Standard Diameters | #8, #10, #12, 1/4" (or M4.2, M4.8, M5.5, M6.3) |
| Standard Lengths | 3/4" (19mm) to 6" (150mm). Custom lengths available. |
| Standards | Conforms to ANSI, SAE, and relevant industry specifications. |
Key Features & Benefits
Integrated Design: The hardened, integrated drill tip efficiently cuts through metal sheets, completing drilling and tapping in one step, significantly reducing installation time and lowering labor and tool costs.
Superior Corrosion Resistance: The electro-galvanized coating provides excellent rust and oxidation protection in most indoor and sheltered outdoor environments.
Flush and Aesthetic Surface: The flat head design allows for complete embedding into pre-drilled or through-hole materials, creating a smooth and flush surface, minimizing snagging and facilitating subsequent processing.
High Clamping Force and Vibration Resistance: Made from high-strength steel with high tensile strength and durable threads, it maintains a secure and lasting grip, effectively resisting loosening caused by dynamic loads and vibrations.
Wide Material Compatibility: Effectively fastens a variety of materials, including cold-rolled steel, galvanized steel, and aluminum, and can also be used to fasten wood/other materials to metal substrates.
Typical Applications
Metal Framing & Drywall: Fastening drywall or sheathing to metal studs (25ga., 20ga., 16ga.) in commercial and residential construction.
HVAC & Ductwork: Assembly and sealing of sheet metal ducts, fittings, and enclosures.
Metal Roofing & Siding (Secondary): Attaching trim, flashing, and accessory components to structural purlins or frames. (Note: Not primary for roof panel attachment).
Electrical & Enclosure Assembly: Mounting electrical boxes, cable trays, and panel cabinets to metal structures.
General Fabrication & Maintenance: Fastening in manufacturing, equipment repair, signage, and storage rack assembly where a flush finish is desired.
Why Choose Our Flat Head Self-Drilling Screws?
Optimized Geometric Design: Precisely designed drill tips and spiral flutes ensure rapid chip removal and reduced heat buildup, resulting in smoother and more stable drilling performance.
Rigorous Quality Control: Strict batch testing of coating thickness, hardness, and dimensional accuracy ensures reliable performance and compatibility with drive drills.
Cost-Effective: Compared to stainless steel alternatives, it offers an ideal balance of corrosion resistance, strength, and installation speed at a highly competitive price.
Technical and Logistics Support: We provide clear technical guidelines for drill bit selection and offer flexible packaging options, from retail packaging to industrial bulk packaging, ensuring reliable and timely delivery.
Commitment to Quality & Service
All our products are manufactured to strict quality standards. We are committed to providing solutions that improve project efficiency and durability. For detailed technical data sheets, bulk pricing, or application advice, please contact our sales and engineering support team!
