WhatsApp/Wechat: +86 15176702681
ADD: Yuelong Town Industrial Park, Tianjin, China
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Product Introduction
Engineered for efficiency, our flat-head self-drilling screws integrate drilling, tapping, and fastening into a single operation, eliminating pre-drilling to save time and labor. Constructed from high-strength carbon steel with a quality zinc-plated finish, they provide dependable corrosion resistance and are suitable for joining thin to medium-gauge metal sheets and frames. The countersunk head sits flush for a smooth, professional finish, making them a cost-effective 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
• Engineered for Single-Step Efficiency: A reinforced, integral drill point performs drilling and tapping simultaneously, dramatically boosting installation speed and reducing labor and tooling expenses.
• Proven Corrosion Defense: The electro-zinc plating delivers reliable protection against rust and oxidation, making it suitable for a wide range of indoor and sheltered outdoor applications.
• Flush, Finished Appearance: Designed to countersink completely, the screw head creates a smooth, flat surface that eliminates snagging hazards and is ready for painting or other finishes.
• Secure, Vibration-Resistant Fastening: Manufactured from high-tensile steel with precision-formed threads to ensure superior clamp force and long-term reliability under dynamic loads.
• Broad Application Versatility: Compatible with various base materials including cold-rolled steel, galvanized steel, and aluminum, as well as for fastening wood and other non-metallics to metal substrates.
Typical Applications
• Light steel frame partition wall system installation: Specifically designed for securely fixing facing panels such as gypsum board and cement fiber board to light steel frames of specifications such as 25#, 20#, and 16#. It is a core fastener for partition walls and ceiling projects in commercial and residential buildings.
• HVAC duct fabrication: Suitable for assembling and sealing galvanized steel sheet ducts, irregular fittings, and equipment casings, ensuring airtightness and structural strength at the connections.
• Auxiliary fastening for metal enclosure systems: Used to reliably install accessories such as eaves, trim, flashing, and door and window frames onto the purlins or frames of the main structure. (Note: This is for non-structural auxiliary fastening and is not suitable for the main load-bearing fastening of roof panels and wall panels).
• Electrical equipment and cable support system installation: Meets the mounting requirements of distribution boxes, control cabinets, cable trays, and busbars on steel structures, providing seismic-resistant and stable connections.
• General industrial manufacturing and maintenance: Widely used in various scenarios requiring fasteners with a flat surface after installation, such as mechanical equipment assembly, steel structure repair, signage fixing, and industrial shelving construction.
Why Choose Our Flat Head Self-Drilling Screws?
Precision-Engineered for Performance: Optimized drill geometry—including tip angle and flute design—ensures efficient chip removal and reduced heat buildup, enabling smoother, faster drilling with consistent hole accuracy.
Guaranteed Consistency & Compatibility: Our rigorous quality control includes batch-level verification of coating thickness, core hardness (HRC), and critical dimensions, guaranteeing uniform performance and perfect fit with all mainstream power tools.
Superior Value Proposition: Delivers the corrosion resistance and strength rivaling stainless steel at a significantly lower unit cost, with faster installation driving down your total cost of ownership (TCO).
End-to-End Support: From detailed technical guides for bit selection and installation to flexible packaging and reliable logistics, we provide comprehensive support to ensure seamless integration and on-time project 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!
