Sheet Metal Screws #14 x 2-1/2" Coarse Thread Hex 30-ct - Teks 21356

Achieve fast, secure, and reliable fastening in metal applications with the Teks 21356 Self-Drilling Hex Washer Head Sheet Metal Screw. Designed for professionals and DIYers alike, this 2-1/2-inch screw features a #14 coarse thread and a precision-engineered self-drilling, self-tapping point that effortlessly penetrates light to heavy gauge metal—eliminating the need for pre-drilling and significantly reducing installation time. Packaged in a 30-piece clamshell pack, these screws are ideal for a wide range of construction and industrial applications.

Constructed from high-strength steel with a corrosion-resistant zinc plating, the Teks 21356 offers long-lasting durability and protection against rust and environmental wear. The silver-gray zinc finish ensures a clean, professional appearance while maintaining performance in both indoor and outdoor environments. The coarse thread design provides superior grip and holding power, minimizing loosening due to vibration and thermal movement.

The 3/8" hex washer head combines high torque capability with a built-in washer to distribute load and prevent pull-through, reducing the risk of damage to thin metal sheets. The drive surface is optimized to reduce cam-out during installation, allowing for smooth, consistent driving with standard hex bits and power tools. This feature enhances efficiency and reduces operator fatigue, especially during high-volume installations.

Engineered with a self-drilling Type 3 point, these screws pierce through steel framing, ductwork, and metal accessories with ease, creating a clean hole and forming strong, permanent threads in a single step. The self-tapping action ensures a tight, secure fit that maintains structural integrity and improves joint strength. Ideal for use in residential steel frame construction, HVAC ductwork, and mounting electrical accessories to metal studs.

With a total length of 2-1/2 inches and SAE measurement standard, these screws are compatible with standard U.S. construction practices and tools. Their interior/exterior suitability makes them a versatile choice for projects exposed to moisture, temperature fluctuations, and mechanical stress.

Features

- #14 x 2-1/2" self-drilling, self-tapping sheet metal screw for fast, one-step installation  

- Eliminates need for pre-drilling—penetrates light to heavy gauge metal with ease  

- Coarse thread design provides strong holding power and resistance to vibration  

- 3/8" hex washer head reduces cam-out and prevents pull-through during installation  

- Integrated washer distributes load and improves clamp force  

- Zinc-plated steel construction offers corrosion resistance and long-term durability  

- Silver finish blends well in industrial and residential settings  

- Ideal for steel framing, ductwork, and electrical mounting applications  

- Suitable for both interior and exterior use in demanding environments  

- Pack of 30 for medium to large-scale projects  

Specifications

- Brand Name: Teks  

- Model Name: Teks 21356  

- Part Number: 21356  

- UPC: Not specified  

- UNSPSC: 31161500  

- Product Type: Sheet Metal Screws  

- Fastener Type: Screw  

- Primary Material: Steel  

- Fastener/Connector Material: Steel  

- Fastener Plating: Zinc  

- Finish: Zinc  

- Finish Family: Gray  

- Color: Silver  

- Head Style: Hex Washer Head  

- Screw Head Style: Hex  

- Drive Style: Hex  

- Drive Size: 3/8"  

- Thread Size: #14  

- Diameter: #14  

- Thread Type: Coarse  

- Fastener Thread Style: Coarse  

- Length: 2-1/2 inches  

- Product Length (in.): 2.5  

- Point Type: Self-Drilling, Self-Tapping  

- Self Drilling: Yes  

- Self Tapping: Yes  

- Application: Residential steel frame construction, duct work to steel framing, electrical accessories to steel framing  

- Applicable Materials: Metal  

- Indoor or Outdoor: Indoor and Outdoor  

- Interior or Exterior: Interior/Exterior  

- Packaging Type: Clamshell  

- Number in Package: 30 pk  

- Package Quantity: 30 pk  

- Pack Size: 30  

- Each Weight: 1.000 lb  

- Product Dimensions: Width 3.50", Height 5.25", Length 2.5"  

- Measurement Standard: SAE  

- ECCN: EAR99  

- Manufacturer: Teks  

- Country of Origin: China  

Product Application

The Teks 21356 Self-Drilling Sheet Metal Screw is designed for high-performance fastening in metal-to-metal applications across residential, commercial, and industrial settings. Commonly used in steel frame construction, HVAC duct installation, and securing electrical components to metal studs, these screws deliver strong, vibration-resistant connections without pre-drilling. Their corrosion-resistant finish and durable construction ensure long-term reliability in both dry and humid environments. With efficient installation and excellent holding power, they are a trusted choice for contractors and builders seeking speed, strength, and consistency in demanding metal fastening tasks.