WhatsApp/Wechat: +86 15176702681
ADD: Yuelong Town Industrial Park, Tianjin, China
| Length: | |
|---|---|
| Thread size: | |
| Quantity: | |
Product Overview
Designed for rapid, high-strength fastening in metal construction and fabrication, our Galvanized Flat Head Self-Drilling Screws combine drilling, tapping, and fastening into one efficient operation, eliminating the need for separate pilot holes. Manufactured from high-tensile carbon steel and finished with a high-quality zinc plating, these screws provide reliable corrosion resistance and robust performance for joining thin to medium gauge metals, steel studs, and other substrates. The flat countersunk head delivers a clean, flush finish, making it ideal for applications requiring a smooth surface profile. A cost-effective and time-saving solution for HVAC, metal framing, roofing, and general industrial assembly.
Technical 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
All-in-One Fastening Solution: The hardened, integrated drill point efficiently cuts through sheet metal, creating its own pilot hole and forming mating threads in a single step, drastically reducing installation time, labor, and tooling costs.
Superior Corrosion Protection: The electro-galvanized zinc coating acts as a sacrificial barrier, providing excellent defense against rust and oxidation in most indoor and sheltered outdoor environments. Passivated finishes offer additional protection.
Flush, Aesthetic Finish: The flat head design sinks completely into pre-drilled or drilled-through materials, resulting in a smooth, low-profile surface that minimizes snagging and allows for seamless finishing (e.g., painting, sealing).
High Clamp Force & Vibration Resistance: Made from hardened steel for high tensile strength and durable threads designed to maintain a secure, long-lasting grip that resists loosening under dynamic loads and vibration.
Wide Material Compatibility: Effectively fastens a range of materials including cold-rolled steel, galvanized steel, aluminum, and can be used to fasten wood/other materials to metal substrates.
Drill Point Coding System: Color-coded drill points (e.g., Yellow Zinc for #3 point) and clear sizing allow for quick visual identification and selection of the correct screw for the material thickness.
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 Galvanized Self-Drilling Screws?
Optimized Geometry: Precision-engineered drill point and flute design ensure fast chip evacuation, reduced heat buildup, and smoother, more consistent drilling performance.
Consistent Quality Control: Rigorous batch testing for coating thickness (microns), hardness (Rockwell), and dimensional accuracy guarantees reliable performance and driver bit ompatibility.
Cost-Effective Performance: Offers an ideal balance of corrosion resistance, strength, and installation speed at a highly competitive price point compared to stainless steel alternatives.
Technical & Logistical Support: We provide clear technical guides for point selection and offer flexible packaging options from retail packs to bulk industrial boxes with reliable, on-time delivery.
Commitment to Quality & Service
Our products are manufactured to exacting quality standards. We are committed to providing solutions that enhance your project's efficiency and durability. For detailed technical data sheets, volume pricing, or application consultation, please contact our sales and engineering support team.
