Roofing Fasteners By SUNKIN

• Corrosion ResistantMade of stainless steel 18-8 (304) to resist rust and corrosion. Suitable for outdoor use and ideal for projects like attaching solar panels and roofing repair. It can withstand exposure to high humidity environments and maintain its appearance over time.
• High Drilling CapacityProperly hardened alloy steel drilling tip. Drilling capacity up to .196 inch (5mm) mild steel or aluminum. Good for applying to a drilling tool that is required to make precise holes in metal. Great choice of metal-to-metal fastening.
• High EfficiencyBi-Metal design combines a hardened steel tip and stainless steel body. This design provides the benefits of both materials, allowing for a sharp and durable screw tip that can resist breakage and wear while drilling into materials. It also helps to dissipate heat during drilling, which can prolong the lifespan of the screw and increase its efficiency.
• Widely UsageIdeal for attaching wood-to-steel, metal-to-metal, aluminum or other tough material fastening. Perfect work without pre-drilling. Easy for construction, DIY, and repair projects. Perfect work without pre-drilling saves your time and effort.
• Standard Hex HeadHexagon washer head 5/16" A/F are threaded fasteners with a six-sided head. Providing a larger surface-bearing area for better clamping.