M3.9/M4.2 410 stainless steel round head with padded black drill tail self-tapping screw large flat head dovetail self-drilling screw for Metal Sheet & Construction

Our 410 stainless steel self-drilling and self-tapping screws are engineered for high-performance fixing in metal sheet, construction, and light industrial scenarios, combining durability, ease of use, and reliable holding power—perfectly aligned with Shopify’s search optimization and industrial application needs.

 

Crafted from premium 410 stainless steel, these screws feature excellent corrosion resistance and tensile strength, able to withstand daily wear and harsh working environments (such as outdoor construction, metal sheet assembly, and light industrial use). The black padded drill tail design not only enhances the screw’s wear resistance but also prevents scratches on the installed material, ensuring a neat and secure fit.

 

Available in M3.9 and M4.2 sizes, the screws integrate two functional designs: round head with padded black drill tail (for precise, non-damaging installation) and large flat head dovetail (for stable fixation in construction and metal assembly). The self-tapping threads are precision-machined to ensure smooth, quick installation—no pre-drilling required, significantly improving assembly efficiency.

 

These screws are widely applicable to metal sheet fixing, construction fasteners, light industrial equipment assembly, and DIY metal projects. Each screw undergoes strict quality inspection to ensure consistent size, smooth thread, and reliable performance, making them a trusted choice for both professional industrial use and daily maintenance.