Hex Washer Head Self-Drilling Tek Screws (Zinc Plated)
Hex Washer Head Self-Drilling Tek Screws (Zinc Plated)
Streamline metal-to-metal and sheet metal fastening with our Zinc-Plated Hex Washer Head Self-Drilling Screws (commonly known as Tek Screws). Designed with an integrated drill-bit point, these heavy-duty fasteners drill their own hole, tap matching mating threads, and clamp sheets securely in a single continuous operation—eliminating the need for pre-drilling or punch marking.
Featuring a heavy-duty Hex Washer Head with an indented Phillips cross recess (Combo Drive), these screws allow flexible driving using either a standard hex magnetic nut setter or a #2/#3 Phillips driver bit. The bright zinc-plated finish offers superior resistance against rust, corrosion, and surface oxidation in indoor and weather-protected outdoor applications.
Key Features
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Self-Drilling Drill Point (Tek Point): Cuts through sheet steel, purlins, aluminum profiles, and ductwork effortlessly without pre-drilling.
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Combo Hex Washer Head Drive: Operates with both a standard magnetic hex socket wrench and a Phillips driver bit for versatile job site utility.
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Built-in Flange Washer: Integrated washer face distributes clamping load evenly across thin sheet metals, preventing crushing or pull-through.
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Corrosion-Resistant Zinc Coating: Bright clear-zinc plating protects against moisture, rust, and surface wear.
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Heat-Treated Hardened Carbon Steel: High shear and tensile strength ensures high-torque driving without snapping under load.
Product Specifications
| Attribute | Specification |
| Product Type | Hex Washer Head Self-Drilling Screws / Tek Screws |
| Material | Case-Hardened Carbon Steel (Grade C1022A) |
| Finish | Bright Zinc Plated (Clear / Blue-White) |
| Head Style | Hex Washer Head with Indented Phillips Recess |
| Drive Type | Dual Drive: Magnetic Hex Nut Setter + Phillips Cross Drive |
| Point Type | Self-Drilling Point (No. 2 / No. 3 Drill Point) |
| Application | Sheet Metal Assembly, Steel Framing, HVAC Ducting, Roofing Panels, & Structural Purlins |
Standard Size Matrix & Technical Specifications
| Gauge Size | Metric Diameter | Hex Socket Size | Drilling Capacity (Steel Thickness) | Available Lengths (Imperial / Metric) |
| #8 | 4.2 mm | 1/4" (6.35 mm) | 0.7 mm – 2.2 mm | 1/2" (13mm), 3/4" (19mm), 1" (25mm), 1-1/2" (38mm) |
| #10 | 4.8 mm | 5/16" (8.0 mm) | 0.8 mm – 3.0 mm | 1/2" (13mm), 3/4" (19mm), 1" (25mm), 1-1/4" (32mm), 1-1/2" (38mm), 2" (50mm) |
| #12 | 5.5 mm | 5/16" (8.0 mm) | 1.2 mm – 4.5 mm | 3/4" (19mm), 1" (25mm), 1-1/2" (38mm), 2" (50mm), 2-1/2" (65mm), 3" (75mm) |
| #14 | 6.3 mm | 3/8" (10.0 mm) | 1.5 mm – 6.0 mm | 1" (25mm), 1-1/2" (38mm), 2" (50mm), 2-1/2" (65mm), 3" (75mm), 4" (100mm) |