WhatsApp/Wechat: +86 15176702681
ADD: Yuelong Town Industrial Park, Tianjin, China
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Product Introduction
Our White Zinc Countersunk Head Self Drilling Screw is designed for high-strength, fast fastening in the metal construction and manufacturing industries. These screws integrate drilling, tapping, and fastening functions, eliminating the need for pre-drilling and significantly improving work efficiency. Made of high-strength carbon steel and treated with premium galvanizing, they offer reliable corrosion resistance and superior performance, suitable for joining thin to medium-thickness metal sheets, steel frames, and other substrates. The flat, countersunk design provides a smooth, flat surface, making it ideal for applications requiring a smooth finish. This is a cost-effective and time-saving solution for HVAC, metal framing, roofing projects, 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 reinforced, one-piece drill bit efficiently cuts through metal sheets, completing drilling and tapping in a single step, significantly reducing installation time and lowering labor and tool costs.
Excellent 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 sits flush within pre-drilled or through-hole materials, creating a smooth, even surface that minimizes snagging and facilitates 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 long-lasting connection, 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
HVAC and Ductwork Systems: Assembling and sealing sheet metal ducts, fittings, and enclosures.
Metal Framing and Drywall: Securing drywall or wallboard to metal studs (25 gauge, 20 gauge, 16 gauge) in commercial and residential buildings.
Metal Roofing and Siding (Auxiliary Use): Securing trim, flashing, and accessories to structural purlins or framing. (Note: Not for primary fastening of roof panels).
General Manufacturing and Maintenance: For fastening applications requiring a flush surface in manufacturing, equipment repair, sign making, and shelving assembly.
Electrical and Enclosure Assembly: Mounting electrical boxes, cable trays, and distribution panels to metal structures.
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!
