Self Drilling Screws with an unslotted indented hex washer head provide fast, secure fastening without pre-drilling. These #3 point fasteners are zinc plated for durable corrosion resistance and measure 5/16 in diameter by 2-1/2 in length.

Designed for metal-to-metal applications, the unslotted drive and indented hex washer head deliver a flush, high-load finish while sealing against the elements. The #3 point cut ensures quick penetration with minimal driving torque.

• Self-drilling capability: Drills the pilot hole as it fastens, saving time and reducing steps.
• Indented hex washer head: Provides a wide bearing surface for load distribution and a clean, flush appearance.
• Unslotted drive: Hex drive delivers strong torque transfer and tamper-resistant performance.
• Corrosion resistance: Zinc plating protects against rust in indoor and outdoor applications.
• Size: 5/16″ diameter, 2-1/2″ length; suitable for metal thickness ranges common in construction and fabrication.

Perfect for metal roofing, enclosures, automotive fenders, appliance assembly, and general metal fabrication. Stock these self drilling screws to streamline projects that require reliable, fast installations with minimal tools.